platzi.com

platzi.com is SSL secured

Free website and domain report on platzi.com

Last Updated: 3rd July, 2022 Update Now
Overview

Snoop Summary for platzi.com

This is a free and comprehensive report about platzi.com. Platzi.com is hosted in United States on a server with an IP address of 104.17.175.85, where USD is the local currency and the local language is English. Our records indicate that platzi.com is owned/operated by Cloudflare, Inc.. Platzi.com is expected to earn an estimated $571 USD per day from advertising revenue. The sale of platzi.com would possibly be worth $416,866 USD. This figure is based on the daily revenue potential of the website over a 24 month period. Platzi.com receives an estimated 135,032 unique visitors every day - an insane amount of traffic! This report was last updated 3rd July, 2022.

About platzi.com

Site Preview: platzi.com platzi.com
Title: Platzi: ‎Cursos Online Profesionales de Tecnología
Description: Aprende desde cero a crear el futuro web con nuestros Cursos Online Profesionales de Tecnología. 🚀¡Cursos de Desarrollo, Diseño, Marketing y Negocios!
Keywords:
Popular Terms: platzi, diseño grafico, platzi cursos, platzi inc, curso de trading platzi, platzi marca personal, platzi com live, curso de animaciones para la web platzi mega, platzi, formula de la covarianza
Fav Icon:
Tags and Categories: education, popular, reference
Age: Over 10 years old
Domain Created: 7th January, 2013
Domain Updated: 25th January, 2018
Domain Expires: 7th January, 2023
Review

Snoop Score

3/5 (Great!)

Valuation

$416,866 USD
Note: All valuation figures are estimates.

Popularity

Very High
Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank: 10,101
Alexa Reach:
SEMrush Rank (US): 275,966 (View worldwide rankings)
SEMrush Authority Score: 58
Moz Domain Authority: 0
Moz Page Authority: 0

Organic vs Paid (Google Ads)

Organic Paid
Keywords: 8,964 2
Traffic: 4,913 0
Cost: $41,671 USD $0 USD

Alexa Graphs

Rank (12 Month Period)
Alexa Rank Graph for platzi.com
Search (12 Month Period)
Alexa Search Graph for platzi.com
Traffic

Visitors

Daily Visitors (Unique): 135,032
Monthly Visitors (Unique): 4,109,949
Yearly Visitors (Unique): 49,286,680
Note: All visitors figures are estimates.

Visitors By Country

Revenue

Revenue

Daily Revenue: $571 USD
Monthly Revenue: $17,381 USD
Yearly Revenue: $208,428 USD
Note: All revenue figures are estimates.

Revenue By Country

SEO

Backlinks Analysis (SEMrush)

Backlinks: 935,256
Referring Domains: 5,131
Referring IPs: 4,879
Platzi.com has 935,256 backlinks according to SEMrush. 91% of these backlinks are "dofollow" (follow) links which allow the flow of link equity to pass through, which may improve platzi.com's search engine rankings. Other links are treated as 'hints' by search engines and may also pass link equity, depending on what search engines decide in each case.
100% of platzi.com's backlinks are text and image links, which are ideal for SEO. Other backlink types may be unrecognized or ignored by search engines.

Top New Follow Links

1
Source: https://platzi.com.br/
Target: https://platzi.com/

2
Source: https://platzi.com.br/
Target: https://platzi.com/whatsapp

3
Source: https://platzi.com.br/
Target: https://courses.platzi.com/

4
Source: https://carlosazaustre.es/imagenes-responsive/
Target: https://platzi.com/cursos/responsive-design/

5
Source: https://carlosazaustre.es/el-camino-para-ser-un-pro-en-javascript/
Target: http://platzi.com/c/cazaustre

Top Ranking Keywords (US)

1
Keyword: platzi
Ranked Page: https://courses.platzi.com/

2
Keyword: diseño grafico
Ranked Page: https://platzi.com/diseno-grafico/

3
Keyword: platzi cursos
Ranked Page: https://platzi.com/

4
Keyword: platzi inc
Ranked Page: https://courses.platzi.com/

5
Keyword: curso de trading platzi
Ranked Page: https://platzi.com/cursos/trading-basico/

Domain Analysis

Value Length
Domain: platzi.com 10
Domain Name: platzi 6
Extension (TLD): com 3
Expiry Check:

Page Speed Analysis

Average Load Time: 3.20 seconds
Load Time Comparison: Faster than 23% of sites

PageSpeed Insights

Avg. (All Categories) 76
Performance 86
Accessibility 93
Best Practices 73
SEO 92
Progressive Web App 36
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://platzi.com/
Updated: 3rd March, 2021

2.39 seconds
First Contentful Paint (FCP)
23%
60%
17%

0.01 seconds
First Input Delay (FID)
92%
4%
4%

Simulate loading on desktop
86

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for platzi.com. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Speed Index — 1.1 s
The time taken for the page contents to be visibly populated.
Largest Contentful Paint — 1.2 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More

Other

Estimated Input Latency — 30 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive platzi.com as laggy when the latency is higher than 0.05 seconds.
Network Requests
Below is a list of network requests that were made during page load.
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https://analytics.twitter.com/i/adsct?type=javascript&version=1.1.0&p_id=Twitter&p_user_id=0&txn_id=nyfpx&events=%5B%5B%22pageview%22%2Cnull%5D%5D&tw_sale_amount=0&tw_order_quantity=0&tw_iframe_status=0&tpx_cb=twttr.conversion.loadPixels&tw_document_href=https%3A%2F%2Fplatzi.com%2F
http/1.1
1690.9079999896
1736.9980000076
964
31
200
application/javascript
Script
https://analytics.twitter.com/i/adsct?type=javascript&version=1.1.0&p_id=Twitter&p_user_id=0&txn_id=o4o2g&events=%5B%5B%22pageview%22%2Cnull%5D%5D&tw_sale_amount=0&tw_order_quantity=0&tw_iframe_status=0&tpx_cb=twttr.conversion.loadPixels&tw_document_href=https%3A%2F%2Fplatzi.com%2F
http/1.1
1692.1190000139
1735.3759999969
963
31
200
application/javascript
Script
https://configusa.veinteractive.com/scripts/shared/vendor.js
http/1.1
1712.629000016
1760.7520000311
32225
90934
200
application/javascript
Script
https://configusa.veinteractive.com/scripts/shared/iframeStorage-5.0.0.html?iframeid=ve-storage-iframe&journeyCode=4ab4fc2a-3564-4f69-91ed-a8b48d732acb&journeyId=16273
http/1.1
1805.6140000117
1829.2089999886
893
65
200
text/html
Document
https://ad.doubleclick.net/ddm/activity/src=10396884;type=invmedia;cat=platz0;ord=4581826670835.354
http/1.1
1823.1160000432
1844.4740000414
912
0
302
text/html
https://ad.doubleclick.net/ddm/activity/src=10396884;dc_pre=CPq7zY7LlO8CFVMdhwodPnADcA;type=invmedia;cat=platz0;ord=4581826670835.354
http/1.1
1844.9649999966
1871.5990000055
878
0
302
text/html
https://configusa.veinteractive.com/scripts/shared/ifs-5.0.0.js
http/1.1
1854.4230000116
1898.4509999864
3088
6006
200
application/javascript
Script
https://www.facebook.com/tr/
1870.4129999969
1872.6180000231
0
0
-1
Other
https://adservice.google.com/ddm/fls/z/src=10396884;dc_pre=CPq7zY7LlO8CFVMdhwodPnADcA;type=invmedia;cat=platz0;ord=4581826670835.354
http/1.1
1872.5149999955
1878.9650000399
673
42
200
image/gif
Image
https://cookieu2.veinteractive.com/api/Set/4AB4FC2A-3564-4F69-91ED-A8B48D732ACB?ifs=true&offset=480&referrer=platzi.com&status=0&ttl=0&uid=&version=5.0.0
http/1.1
1909.421999997
1976.6759999911
757
36
200
application/json
XHR
https://sessionapiusa.veinteractive.com/api/appsmanagerinit?isCookieEnabled=false&timeToLive=0&captureVersion=5.0&journeyCode=4AB4FC2A-3564-4F69-91ED-A8B48D732ACB&landingPage=https%3A%2F%2Fplatzi.com%2F&offset=480&referrerDomain=&status=-1&uid=True&userAgent=Mozilla%2F5.0%20(Macintosh%3B%20Intel%20Mac%20OS%20X%2010_14_6)%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F84.0.4143.7%20Safari%2F537.36%20Chrome-Lighthouse
http/1.1
1981.7110000295
2133.2800000091
788
608
200
application/json
XHR
https://dtrcusa.veinteractive.com/FormMappings
http/1.1
2156.3639999949
2244.5690000313
469
0
200
Other
https://dtrcusa.veinteractive.com/FormMappings
http/1.1
2245.2770000091
2271.8420000165
385
0
204
XHR
https://static.platzi.com/media/teachers/Screen_Shot_2020-06-10_at_6.56.58_PM.png
http/1.1
2832.9580000136
2892.743000004
225405
224394
200
image/webp
Image
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
216.952
9.965
355.447
18.064
373.528
97.64
494.488
36.795
534.154
10.554
574.311
14.03
592.611
13.354
606.457
22.591
638.262
8.681
654.163
16.839
671.042
21.622
692.821
5.559
718.545
54.449
773.212
10.622
786.025
19.909
805.96
20.396
827.78
376.947
1204.799
5.526
1212.058
8.157
1222.463
16.473
1242.655
48.623
1295.47
7.036
1303.846
7.115
1320.497
26.968
1347.51
9.191
1356.716
8.854
1365.652
31.353
1398.717
52.291
1463.819
6.976
1470.896
5.029
1476.82
7.328
1485.982
14.031
1500.144
28.258
1539.34
6.765
1561.206
8.575
1575.725
5.666
1581.43
6.788
1588.397
13.999
1605.315
6.658
1617.053
23.013
1645.796
6.014
1654.992
13.268
1668.679
9.779
1683.675
34.404
1718.129
6.338
1735.218
6.18
1762.303
6.179
1797.925
55.895
1854.875
11.859
1867.721
7.452
1875.663
5.973
1895.523
6.798
1907.5
5.657
1930.626
6.689
1957.098
5.628
2003.923
5.589
2012.935
6.116
2112.285
5.546
2162.309
6.73
2169.063
6.715
2178.323
6.315
2212.188
6.319
2253.904
16.768
2270.767
6.229
2303.991
10.617
2314.745
5.093
2362.187
5.206
2456.989
5.383
2503.926
24.5
2603.897
19.473
2623.494
5.048
2707.982
5.949
2762.212
6.279
2812.196
5.053
2857.425
6.082
2912.222
6.583
2932.451
5.665
2964.289
6.196
3012.166
6.356
3062.157
5.538
3112.177
6.324
3162.167
5.432
3212.132
6.349
3255.997
5.294
3312.142
5.709
3362.154
6.022
3405.825
5.08
3462.123
5.204
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Platzi.com should consider lazy-loading offscreen and hidden images.
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Platzi.com should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Platzi.com should consider minifying JS files.
Remove unused CSS — Potential savings of 11 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Platzi.com should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://static.platzi.com/mf-landings/assets/dlls.0f3dca8a827edc005723.css
14856
11588
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Serve images in next-gen formats
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 120 ms
Keep the server response time for the main document short because all other requests depend on it.
URL Time Spent (Ms)
https://platzi.com/
118.745
Avoid multiple page redirects — Potential savings of 190 ms
Redirects can cause additional delays before the page can begin loading. Platzi.com should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
http://platzi.com/
190
https://platzi.com/
0
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Platzi.com should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
Avoid serving legacy JavaScript to modern browsers — Potential savings of 29 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers. Learn More
URL Potential Savings (Bytes)
https://connect.facebook.net/signals/config/1545967215651797?v=2.9.33&r=stable
11970
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
9902
https://configusa.veinteractive.com/scripts/5.0/capture-apps-5.0.0.js
8171
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
110
https://connect.facebook.net/en_US/fbevents.js
45
Preload Largest Contentful Paint image
Preload the image used by the LCP element in order to improve your LCP time.

Diagnostics

Avoids enormous network payloads — Total size was 2,409 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://static.platzi.com/media/teachers/Screen_Shot_2020-06-10_at_6.56.58_PM.png
225405
https://static.platzi.com/media/teachers/teachers/276-daniela-belen-gonzalez
184899
https://static.platzi.com/media/teachers/teachers/132-nicole-chapaval
173381
https://static.platzi.com/mf-landings/assets/common.a608f3747bb0e06a5579.js
160653
https://static.platzi.com/mf-landings/image/experience_desktop@2x-e83a6b6338d9c9361d61c1dbf6059ab5.png
158132
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
153318
https://static.platzi.com/mf-landings/image/experience_mobile@2x-66ee5aa66dd36681b817d2a5320a042c.png
138291
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
129128
https://static.platzi.com/mf-landings/image/company_logos_sprite@3x-fa1ca40e84691583fdb564da22fa3c11.png
81692
https://connect.facebook.net/signals/config/1545967215651797?v=2.9.33&r=stable
72227
Avoid chaining critical requests — 7 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Platzi.com should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
JavaScript execution time — 0.9 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
631.745
593.759
11.601
https://platzi.com/
420.757
9.653
4.585
Unattributable
160.358
1.299
0.157
https://platzi.com/cdn-cgi/bm/cv/669835187/api.js
105.42
103.119
0.955
https://www.googletagmanager.com/gtm.js?id=GTM-MPT6TFW
100.673
89.178
8.324
https://configusa.veinteractive.com/scripts/5.0/capture-apps-5.0.0.js
97.698
85.475
5.499
Minimizes main-thread work — 1.9 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Script Evaluation
1125.655
Other
281.735
Rendering
189.126
Style & Layout
175.444
Script Parsing & Compilation
101.93
Garbage Collection
33.577
Parse HTML & CSS
27.991
All text remains visible during webfont loads
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
Keep request counts low and transfer sizes small — 145 requests • 2,409 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
145
2466850
Image
76
1385145
Script
28
958544
Stylesheet
6
38026
Font
3
34755
Document
5
29762
Other
27
20618
Media
0
0
Third-party
72
565999
Minimize third-party usage — Third-party code blocked the main thread for 0 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
156948
0
128432
0
97737
0
62331
0
36334
0
27181
0
13973
0
9488
0
6930
0
4633
0
4477
0
4436
0
3541
0
2344
0
1571
0
935
0
278
0
Lazy load third-party resources with facades
Some third-party embeds can be lazy loaded. Consider replacing them with a facade until they are required.
Largest Contentful Paint element — 1 element found
This is the largest contentful element painted within the viewport. Learn More
Element
Avoid large layout shifts — 5 elements found
These DOM elements contribute most to the CLS of the page.
Element CLS Contribution
0.046168928833456
0.042269340507051
0.013668990649906
0.013044397570718
0.011922121681476
Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 4 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay.
URL Start Time (Ms) Duration (Ms)
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
3290
377
https://configusa.veinteractive.com/scripts/shared/vendor.js
2820
56
https://www.googletagmanager.com/gtm.js?id=GTM-MPT6TFW
1632
54
https://platzi.com/cdn-cgi/bm/cv/669835187/api.js
582
52
Avoid non-composited animations
Animations which are not composited can be janky and increase CLS.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
Set a timing budget to help you keep an eye on the performance of your site. Performant sites load fast and respond to user input events quickly.

Metrics

First Contentful Paint — 1.1 s
The time taken for the first image or text on the page to be rendered.
Time to Interactive — 3.2 s
The time taken for the page to become fully interactive.
Total Blocking Time — 170 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Cumulative Layout Shift — 0.13
Cumulative Layout Shift measures the movement of visible elements within the viewport.
View Data

Other

First CPU Idle — 2.7 s
The time taken for the page's main thread to be quiet enough to handle input.
First Meaningful Paint — 1.1 s
The time taken for the primary content of the page to be rendered.

Opportunities

Eliminate render-blocking resources — Potential savings of 680 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Platzi.com should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-svg-core@1.2.28/styles.css
2344
230
https://static.platzi.com/mf-landings/assets/vendors.0f3dca8a827edc005723.css
1175
230
https://static.platzi.com/mf-landings/assets/dlls.0f3dca8a827edc005723.css
14856
270
https://static.platzi.com/mf-landings/assets/home-public.0f3dca8a827edc005723.css
16650
270
https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.2.0/styles/monokai.min.css
1422
230
Properly size images — Potential savings of 775 KiB
Images can slow down the page's load time. Platzi.com should consider serving more appropriate-sized images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://static.platzi.com/media/teachers/Screen_Shot_2020-06-10_at_6.56.58_PM.png
224394
204257
https://static.platzi.com/mf-landings/image/experience_desktop@2x-e83a6b6338d9c9361d61c1dbf6059ab5.png
157094
126902
https://static.platzi.com/mf-landings/image/experience_mobile@2x-66ee5aa66dd36681b817d2a5320a042c.png
137254
111085
https://static.platzi.com/media/teachers/teachers/276-daniela-belen-gonzalez
184005
104711
https://static.platzi.com/media/teachers/teachers/132-nicole-chapaval
172486
98156
https://static.platzi.com/mf-landings/image/comunity_1@2x-41489cceda0735ad88f96509c6058597.png
36486
27365
https://static.platzi.com/mf-landings/image/comunity_2@2x-d25b942060a481662d3da0bc25f1378d.png
29602
22202
https://static.platzi.com/media/teachers/sebastian-sosa.jpg
24828
21155
https://static.platzi.com/media/teachers/natalia-fainberg.jpg
23756
20241
https://static.platzi.com/media/teachers/estefany-aguilar.jpg
23542
20059
https://static.platzi.com/media/teachers/diego-de-granda.jpg
22044
18783
https://static.platzi.com/media/teachers/rosa-morel.jpg
12410
10574
https://static.platzi.com/media/learningpath/emblems/0b5d503f-4779-4275-88f7-7d0928ec2c8f.jpg
8514
7738
Remove unused JavaScript — Potential savings of 459 KiB
Remove unused JavaScript to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://static.platzi.com/mf-landings/assets/common.a608f3747bb0e06a5579.js
160653
127694
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
153318
91163
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
129128
87376
https://connect.facebook.net/signals/config/1545967215651797?v=2.9.33&r=stable
72227
54272
https://configusa.veinteractive.com/scripts/5.0/capture-apps-5.0.0.js
70572
37889
https://www.googletagmanager.com/gtag/js?id=G-6CP8Y3QSZQ&l=dataLayer&cx=c
54408
28590
https://configusa.veinteractive.com/scripts/shared/vendor.js
32225
22140
https://www.googletagmanager.com/gtag/js?id=AW-759649979
40152
21032

Diagnostics

Avoid an excessive DOM size — 997 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
997
Maximum DOM Depth
17
Maximum Child Elements
27

Other

Max Potential First Input Delay — 380 ms
Users could experience a delay when interacting with the page.

Diagnostics

Serve static assets with an efficient cache policy — 13 resources found
Platzi.com can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://platzistaging.s3-us-west-2.amazonaws.com/commons/assets/image/isotipoPlatzi442ccc1186a9806e18c9889cc301ffe1.png
0
2471
https://platzistaging.s3-us-west-2.amazonaws.com/commons/assets/image/logotipo-platzi768799552e5f26369e21a807b8a533f7.png
0
2162
https://p.adsymptotic.com/d/px/?_pid=16218&_psign=0aa5badf92527f7732e22463d6fa4dbc&coopa=0&gdpr=0&gdpr_consent=&_puuid=e218f756-c072-49ab-90f7-b58cf7a84a51&_expected_cookie=0a2d57bd79be0e9755d74500a8d51382
0
737
https://www.redditstatic.com/ads/pixel.js
60000
6293
https://configusa.veinteractive.com/tags/4AB4FC2A/3564/4F69/91ED/A8B48D732ACB/tag.js
1144000
19255
https://connect.facebook.net/signals/config/1545967215651797?v=2.9.33&r=stable
1200000
72227
https://connect.facebook.net/en_US/fbevents.js
1200000
25003
https://configusa.veinteractive.com/scripts/5.0/capture-apps-5.0.0.js
1549000
70572
https://configusa.veinteractive.com/scripts/shared/ifs-5.0.0.js
2429000
3088
https://www.google-analytics.com/plugins/ua/ecommerce.js
3600000
1339
https://www.google-analytics.com/analytics.js
7200000
19615
https://snap.licdn.com/li.lms-analytics/insight.min.js
58868000
2169
https://platzi.com/cdn-cgi/bm/cv/669835187/api.js
604800000
9721
Image elements do not have explicit `width` and `height`
Set an explicit width and height on image elements to reduce layout shifts and improve CLS.
URL Failing Elements
https://static.platzi.com/mf-landings/image/experience_desktop@2x-e83a6b6338d9c9361d61c1dbf6059ab5.png
https://static.platzi.com/media/promos/Banner-logo_1_1.png
https://platzistaging.s3-us-west-2.amazonaws.com/commons/assets/image/isotipoPlatzi442ccc1186a9806e18c9889cc301ffe1.png
https://platzistaging.s3-us-west-2.amazonaws.com/commons/assets/image/logotipo-platzi768799552e5f26369e21a807b8a533f7.png
https://static.platzi.com/mf-landings/image/experience_mobile@2x-66ee5aa66dd36681b817d2a5320a042c.png
https://static.platzi.com/mf-landings/image/comunity_1@2x-41489cceda0735ad88f96509c6058597.png
https://static.platzi.com/mf-landings/image/comunity_2@2x-d25b942060a481662d3da0bc25f1378d.png
https://static.platzi.com/mf-landings/image/store_googleplay@2x-1ed596d294bfa087f26841656cec9669.png
https://static.platzi.com/mf-landings/image/store_appstore@2x-b9b1e054f6e5df4b57e576d01c45cc66.png
https://static.platzi.com/media/achievements/badge-webpack-3e3867f2-5bcf-4a7e-9af2-cf735850a791.png
https://static.platzi.com/media/achievements/piezas-ingles-viajes_badge-3ff16a80-44e3-413c-9d06-24348c5eb095.png
https://static.platzi.com/media/achievements/badge-cpmunicacion-marketing-marcas-2dd8653f-cc7e-4345-a1b3-a8076116ff72.png
https://static.platzi.com/media/achievements/badge-automatizacion-marketing-digital-fb0327bc-e341-444c-9914-76059aa4ba85.png
https://static.platzi.com/media/achievements/badge-go-57d6b6ee-c9de-4d9e-9e2c-29a0c879748d-1859b16d-1c87-4b38-bf0a-aee1256cc355.webp
https://static.platzi.com/mf-landings/image/agenda_icon@2x-f9f5698196f2dc60648d97b97bf4b27b.png
IBM
93

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of platzi.com. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`button`, `link`, and `menuitem` elements have accessible names
When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
`[aria-hidden="true"]` is not present on the document `<body>`
Assistive technologies, like screen readers, work inconsistently when `aria-hidden="true"` is set on the document ``.
`[aria-hidden="true"]` elements do not contain focusable descendents
Focusable descendents within an `aria-hidden="true"]` element prevent those interactive elements from being available to users of assistive technologies like screen readers. [.
ARIA input fields have accessible names
When an input field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
ARIA `meter` elements have accessible names
When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
ARIA `progressbar` elements have accessible names
When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
When a toggle field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
ARIA `tooltip` elements have accessible names
When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
ARIA `treeitem` elements have accessible names
When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
The value of an ARIA ID must be unique to prevent other instances from being overlooked by assistive technologies.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Form fields with multiple labels can be confusingly announced by assistive technologies like screen readers which use either the first, the last, or all of the labels.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Platzi.com may provide assistance to deaf or hearing-impaired users with captions on videos.

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.
Failing Elements

Navigation

`[id]` attributes on active, focusable elements are not unique
All focusable elements must have a unique `id` to ensure that they're visible to assistive technologies.
Failing Elements
Heading elements are not in a sequentially-descending order
Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies.
Failing Elements

Names and labels

Links do not have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
73

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that platzi.com should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids front-end JavaScript libraries with known security vulnerabilities
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Serves images with appropriate resolution
Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity.
Fonts with `font-display: optional` are preloaded
Preload `optional` fonts so first-time visitors may use them. Learn More

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
A character encoding declaration is required. It can be done with a `<meta>` tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
React
Lo-Dash
4.17.20
core-js
core-js-pure@3.9.0; core-js-pure@3.0.0
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
No issues in the `Issues` panel in Chrome Devtools
Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL Request Resolution
http://platzi.com/
Allowed
Links to cross-origin destinations are unsafe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.

Audits

Registers an `unload` listener
The `unload` event does not fire reliably and listening for it can prevent browser optimizations like the Back-Forward Cache. Consider using the `pagehide` or `visibilitychange` events instead. Learn More
Source
Browser errors were logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
Source Description
Failed to load resource: net::ERR_BLOCKED_BY_CLIENT.Inspector
Failed to load resource: net::ERR_BLOCKED_BY_CLIENT.Inspector
Failed to load resource: the server responded with a status of 403 (Forbidden)
Missing source maps for large first-party JavaScript
Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits.
URL Map URL
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
https://static.platzi.com/mf-landings/assets/common.a608f3747bb0e06a5579.js
https://cdnjs.cloudflare.com/ajax/libs/autotrack/2.4.1/autotrack.js
https://cdnjs.cloudflare.com/ajax/libs/autotrack/2.4.1/autotrack.js.map
92

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for platzi.com. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of platzi.com on mobile screens.
Document uses legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Tap targets are sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Crawling and Indexing

Links are not crawlable
Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn More

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
36

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of platzi.com. This includes details about web app manifests.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of platzi.com on mobile screens.

Installable

Web app manifest or service worker do not meet the installability requirements — 1 reason
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
Failure reason
No manifest was fetched

PWA Optimized

Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
A maskable icon ensures that the image fills the entire shape without being letterboxed when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Avg. (All Categories) 65
Performance 32
Accessibility 93
Best Practices 67
SEO 91
Progressive Web App 42
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://platzi.com/
Updated: 3rd March, 2021

4.08 seconds
First Contentful Paint (FCP)
5%
56%
39%

0.17 seconds
First Input Delay (FID)
70%
14%
16%

Simulate loading on mobile
32

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for platzi.com. This includes details about optimizing page load times which can result in a better user experience.

Opportunities

Defer offscreen images — Potential savings of 13 KiB
Time to Interactive can be slowed down by resources on the page. Platzi.com should consider lazy-loading offscreen and hidden images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://static.platzi.com/media/learningpath/ghosts/57660a5f-8297-4e32-9826-cc3bfd8e935a.jpg
7640
7640
https://static.platzi.com/media/learningpath/ghosts/96f6713b-df79-4217-a02e-d9c770c4f3db.jpg
3164
3164
https://static.platzi.com/mf-landings/image/agenda_icon@2x-f9f5698196f2dc60648d97b97bf4b27b.png
2104
2104
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Platzi.com should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Platzi.com should consider minifying JS files.
Remove unused CSS — Potential savings of 12 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Platzi.com should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://static.platzi.com/mf-landings/assets/dlls.0f3dca8a827edc005723.css
14856
12586
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Serve images in next-gen formats
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 80 ms
Keep the server response time for the main document short because all other requests depend on it.
URL Time Spent (Ms)
https://platzi.com/
78.877
Avoid multiple page redirects — Potential savings of 630 ms
Redirects can cause additional delays before the page can begin loading. Platzi.com should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
http://platzi.com/
630
https://platzi.com/
0
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Platzi.com should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
Avoid serving legacy JavaScript to modern browsers — Potential savings of 30 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers. Learn More
URL Potential Savings (Bytes)
https://connect.facebook.net/signals/config/1545967215651797?v=2.9.33&r=stable
12050
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
9902
https://configusa.veinteractive.com/scripts/5.0/capture-apps-5.0.0.js
8171
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
110
https://connect.facebook.net/en_US/fbevents.js
45
Preload Largest Contentful Paint image
Preload the image used by the LCP element in order to improve your LCP time.

Diagnostics

Avoids enormous network payloads — Total size was 1,389 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://static.platzi.com/mf-landings/assets/common.a608f3747bb0e06a5579.js
160653
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
153318
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
129128
https://connect.facebook.net/signals/config/1545967215651797?v=2.9.33&r=stable
72713
https://configusa.veinteractive.com/scripts/5.0/capture-apps-5.0.0.js
70572
https://www.googletagmanager.com/gtm.js?id=GTM-MPT6TFW
62351
https://www.googletagmanager.com/gtag/js?id=G-6CP8Y3QSZQ&l=dataLayer&cx=c
54407
https://static.platzi.com/mf-landings/image/company_logos_sprite@2x-9c82005a67d4b3d5c11a5bfb90fc8899.png
49980
https://www.googletagmanager.com/gtag/js?id=AW-759649979
40152
https://www.google-analytics.com/gtm/js?id=OPT-NZ7TXPP&t=gtm7&cid=1512291518.1614790455
38907
Avoid chaining critical requests — 7 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Platzi.com should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
All text remains visible during webfont loads
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
Keep request counts low and transfer sizes small — 130 requests • 1,389 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
130
1421990
Script
28
959041
Image
63
342392
Stylesheet
6
37994
Font
3
34755
Document
5
29219
Other
25
18589
Media
0
0
Third-party
69
563600
Lazy load third-party resources with facades
Some third-party embeds can be lazy loaded. Consider replacing them with a facade until they are required.
Largest Contentful Paint element — 1 element found
This is the largest contentful element painted within the viewport. Learn More
Element
Avoid large layout shifts — 5 elements found
These DOM elements contribute most to the CLS of the page.
Element CLS Contribution
0.29930841356046
0.020641959555894
0.013810979358123
0.0091993408203125
0.00842880015199
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 20 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay.
URL Start Time (Ms) Duration (Ms)
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
10440
758
https://configusa.veinteractive.com/scripts/shared/vendor.js
12962
271
https://platzi.com/cdn-cgi/bm/cv/669835187/api.js
2203
232
https://www.googletagmanager.com/gtm.js?id=GTM-MPT6TFW
7569
216
https://platzi.com/
1492
212
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
11370
192
https://platzi.com/cdn-cgi/bm/cv/669835187/api.js
2435
188
https://www.google-analytics.com/plugins/ua/ecommerce.js
3840
179
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
11694
152
https://connect.facebook.net/signals/config/1545967215651797?v=2.9.33&r=stable
8430
130
https://www.googletagmanager.com/gtag/js?id=G-6CP8Y3QSZQ&l=dataLayer&cx=c
10109
127
https://configusa.veinteractive.com/scripts/5.0/capture-apps-5.0.0.js
11562
123
https://www.google-analytics.com/analytics.js
3472
99
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
10020
89
https://www.googletagmanager.com/gtm.js?id=GTM-MPT6TFW
7483
86
https://platzi.com/
1704
81
https://static.platzi.com/mf-landings/assets/common.a608f3747bb0e06a5579.js
10363
77
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
11298
72
https://www.google-analytics.com/gtm/js?id=OPT-NZ7TXPP&t=gtm7&cid=1512291518.1614790455
7261
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https://platzi.com/
1423
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Avoid non-composited animations
Animations which are not composited can be janky and increase CLS.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
Set a timing budget to help you keep an eye on the performance of your site. Performant sites load fast and respond to user input events quickly.

Other

Network Requests
Below is a list of network requests that were made during page load.
URL Protocol Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://platzi.com/
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0
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643
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301
https://platzi.com/
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text/html
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https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-svg-core@1.2.28/styles.css
http/1.1
144.46300000418
165.83099996205
2344
7891
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text/css
Stylesheet
https://static.platzi.com/mf-landings/assets/vendors.0f3dca8a827edc005723.css
http/1.1
144.65200004634
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text/css
Stylesheet
https://static.platzi.com/mf-landings/assets/dlls.0f3dca8a827edc005723.css
http/1.1
144.86000000034
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14856
116185
200
text/css
Stylesheet
https://static.platzi.com/mf-landings/assets/home-public.0f3dca8a827edc005723.css
http/1.1
145.11100004893
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16650
87017
200
text/css
Stylesheet
https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.2.0/styles/monokai.min.css
http/1.1
145.67900006659
171.36899998877
1418
754
200
text/css
Stylesheet
https://www.googletagmanager.com/gtag/js?id=AW-759649979
http/1.1
187.02199996915
200.38599998225
40152
100231
200
application/javascript
Script
https://cdnjs.cloudflare.com/ajax/libs/autotrack/2.4.1/autotrack.js
http/1.1
210.73799999431
236.69100005645
8355
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application/javascript
Script
https://platzi.com/cdn-cgi/bm/cv/669835187/api.js
http/1.1
211.05499996338
235.70600000676
9721
35662
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text/javascript
Script
https://static.platzi.com/media/promos/Banner-logo_1_1.png
http/1.1
220.18100006972
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image/webp
Image
https://static.platzi.com/mf-landings/image/agenda_icon@2x-f9f5698196f2dc60648d97b97bf4b27b.png
http/1.1
220.46700003557
258.47700005397
3132
2104
200
image/webp
Image
https://cdnjs.cloudflare.com/ajax/libs/lazysizes/5.2.0/lazysizes.min.js
http/1.1
220.70499998517
249.13200002629
4190
7235
200
application/javascript
Script
https://static.platzi.com/mf-landings/assets/home-public.0f3dca8a827edc005723.js
http/1.1
220.97799996845
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14120
56870
200
application/javascript
Script
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
http/1.1
221.34200006258
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200
application/javascript
Script
https://static.platzi.com/mf-landings/assets/common.a608f3747bb0e06a5579.js
http/1.1
221.51100006886
303.79300005734
160653
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200
application/javascript
Script
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
http/1.1
221.65399999358
460.07200004533
129128
591219
200
application/javascript
Script
https://fonts.googleapis.com/css2?family=Roboto:wght@400;700;900&display=swap
http/1.1
187.34900001436
198.79300007597
1551
7991
200
text/css
Stylesheet
https://www.google-analytics.com/analytics.js
http/1.1
221.7889999738
227.89300000295
19615
47332
200
text/javascript
Script
https://www.googletagmanager.com/gtm.js?id=GTM-MPT6TFW
http/1.1
222.05900005065
238.58900007326
62351
242588
200
application/javascript
Script
https://connect.facebook.net/en_US/fbevents.js
http/1.1
222.20499999821
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25003
93376
200
application/x-javascript
Script
https://snap.licdn.com/li.lms-analytics/insight.min.js
http/1.1
222.3220000742
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2169
4322
200
application/x-javascript
Script
https://www.redditstatic.com/ads/pixel.js
http/1.1
222.49800001737
239.46199996863
6293
17945
200
application/javascript
Script
https://static.ads-twitter.com/uwt.js
http/1.1
222.61000005528
239.97500003316
2509
5160
200
application/javascript
Script
https://static.platzi.com/mf-landings/image/company_logos_sprite@2x-9c82005a67d4b3d5c11a5bfb90fc8899.png
http/1.1
240.42000004556
291.21699999087
49980
48942
200
image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/7abf1075-51c4-4743-b402-89972b82424c.jpg
http/1.1
241.00999999791
277.86600007676
6485
5468
200
image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/ffb03de2-327e-4bed-8489-ebdda82fe4bc.jpg
http/1.1
241.24900007155
273.09899998363
3277
2260
200
image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/636df14f-a0de-4042-a32b-3bba7be6930d.jpg
http/1.1
241.38700007461
278.71800004505
9800
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image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/b265fdf0-4f60-48aa-b6ab-79e3736d9d90.jpg
http/1.1
241.64400005247
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image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/35ca4561-c63c-48f6-bb65-2b07549a9c58.jpg
http/1.1
242.0540000312
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image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/e83b258f-b51c-4278-a984-94bbf4e388d8.jpg
http/1.1
242.35499999486
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image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/b9c8108a-a023-4218-9077-e647a6ef3aaf.jpg
http/1.1
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image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/5d32429f-7eac-46e2-8bec-e22acadde9ff.jpg
http/1.1
242.86300002132
293.03000005893
3840
2824
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image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/2a896473-5af6-4f50-be34-ccf9881d9c3a.jpg
http/1.1
243.25100006536
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Image
https://static.platzi.com/media/learningpath/ghosts/772df6e6-1578-479e-87a0-9a152b927c7d.jpg
http/1.1
243.52500005625
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image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/ecd180a1-a947-479e-8d83-e69417dd1240.jpg
http/1.1
243.91099996865
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image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/12f35955-dd05-4c7a-8c85-d925a1e6042b.jpg
http/1.1
244.18300006073
272.34300004784
3324
2308
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image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/b303c8eb-9785-4744-beaf-4874dd8dc437.jpg
http/1.1
244.33400004636
301.2330000056
7879
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image/webp
Image
https://static.platzi.com/media/learningpath/ghosts/657a6707-5ad3-4119-9d5d-e71042373574.jpg
http/1.1
244.80600003153
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Image
https://static.platzi.com/media/learningpath/ghosts/ef2fa2e2-08c1-4b15-af83-696ddc52f292.jpg
http/1.1
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https://static.platzi.com/media/learningpath/ghosts/1dcd4356-3352-462b-b58f-3bcdde552cc9.jpg
http/1.1
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http/1.1
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http/1.1
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data
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http/1.1
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Image
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Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
162.146
9.331
249.528
17.185
266.731
105.893
372.802
13.401
386.929
5.856
425.2
40.494
467.568
17.19
505.244
9.468
522.209
8.61
532.141
24.693
562.353
21.585
588.546
16.19
605.206
22.333
627.711
19.207
651.84
54.085
707.158
8.833
717.533
7.665
731.639
5.202
736.857
13.708
752.607
58.052
813.287
378.75
1197.247
44.873
1242.367
7.32
1254.028
7.685
1265.818
46.886
1325.612
6.227
1332.602
5.34
1340.503
32.529
1373.07
31.774
1405.378
16.457
1432.789
6.29
1460.357
7.824
1471.59
6.196
1477.991
17.607
1516.804
30.694
1605.924
37.969
1644.109
12.185
1658.389
5.269
1666.727
67.703
1742.578
9.693
1752.293
14.508
1799.158
14.109
1816.742
5.155
1871.785
7.461
1891.831
10.559
1963.035
7.611
1972.859
6.81
2184.952
18.1
2391.991
5.242
2491.85
47.911
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Metrics

Speed Index — 4.8 s
The time taken for the page contents to be visibly populated.

Opportunities

Properly size images — Potential savings of 41 KiB
Images can slow down the page's load time. Platzi.com should consider serving more appropriate-sized images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://static.platzi.com/media/teachers/natalia-fainberg.jpg
23756
14764
https://static.platzi.com/media/teachers/diego-de-granda.jpg
22044
13700
https://static.platzi.com/media/teachers/rosa-morel.jpg
12410
7713
https://static.platzi.com/media/learningpath/emblems/0b5d503f-4779-4275-88f7-7d0928ec2c8f.jpg
8514
5507

Diagnostics

Avoid an excessive DOM size — 997 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
997
Maximum DOM Depth
17
Maximum Child Elements
27

Metrics

First Contentful Paint — 4.1 s
The time taken for the first image or text on the page to be rendered.
Largest Contentful Paint — 4.5 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Time to Interactive — 12.3 s
The time taken for the page to become fully interactive.
Total Blocking Time — 1,510 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Cumulative Layout Shift — 0.356
Cumulative Layout Shift measures the movement of visible elements within the viewport.
View Data

Other

First CPU Idle — 11.4 s
The time taken for the page's main thread to be quiet enough to handle input.
Max Potential First Input Delay — 760 ms
Users could experience a delay when interacting with the page.
First Meaningful Paint — 4.1 s
The time taken for the primary content of the page to be rendered.
Estimated Input Latency — 220 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive platzi.com as laggy when the latency is higher than 0.05 seconds.
First Contentful Paint (3G) — 7965 ms
The time taken for the first image or text on the page to be rendered while on a 3G network.

Opportunities

Eliminate render-blocking resources — Potential savings of 2,600 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Platzi.com should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-svg-core@1.2.28/styles.css
2344
780
https://static.platzi.com/mf-landings/assets/vendors.0f3dca8a827edc005723.css
1175
780
https://static.platzi.com/mf-landings/assets/dlls.0f3dca8a827edc005723.css
14856
1080
https://static.platzi.com/mf-landings/assets/home-public.0f3dca8a827edc005723.css
16650
1080
https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.2.0/styles/monokai.min.css
1418
780
Remove unused JavaScript — Potential savings of 459 KiB
Remove unused JavaScript to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://static.platzi.com/mf-landings/assets/common.a608f3747bb0e06a5579.js
160653
127694
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
153318
91163
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
129128
87376
https://connect.facebook.net/signals/config/1545967215651797?v=2.9.33&r=stable
72713
54637
https://configusa.veinteractive.com/scripts/5.0/capture-apps-5.0.0.js
70572
37877
https://www.googletagmanager.com/gtag/js?id=G-6CP8Y3QSZQ&l=dataLayer&cx=c
54407
28590
https://configusa.veinteractive.com/scripts/shared/vendor.js
32225
22140
https://www.googletagmanager.com/gtag/js?id=AW-759649979
40152
21032

Diagnostics

Serve static assets with an efficient cache policy — 13 resources found
Platzi.com can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://platzistaging.s3-us-west-2.amazonaws.com/commons/assets/image/isotipoPlatzi442ccc1186a9806e18c9889cc301ffe1.png
0
2471
https://platzistaging.s3-us-west-2.amazonaws.com/commons/assets/image/logotipo-platzi768799552e5f26369e21a807b8a533f7.png
0
2162
https://p.adsymptotic.com/d/px/?_pid=16218&_psign=0aa5badf92527f7732e22463d6fa4dbc&coopa=0&gdpr=0&gdpr_consent=&_puuid=3ac19bd2-b737-42e2-a9a6-62d0bdbd0e20&_expected_cookie=9e877b526f966b20dcefb4023b8085fa
0
737
https://www.redditstatic.com/ads/pixel.js
60000
6293
https://configusa.veinteractive.com/tags/4AB4FC2A/3564/4F69/91ED/A8B48D732ACB/tag.js
533000
19254
https://connect.facebook.net/signals/config/1545967215651797?v=2.9.33&r=stable
1200000
72713
https://connect.facebook.net/en_US/fbevents.js
1200000
25003
https://configusa.veinteractive.com/scripts/shared/ifs-5.0.0.js
2433000
3088
https://configusa.veinteractive.com/scripts/5.0/capture-apps-5.0.0.js
2533000
70572
https://www.google-analytics.com/plugins/ua/ecommerce.js
3600000
1339
https://www.google-analytics.com/analytics.js
7200000
19615
https://snap.licdn.com/li.lms-analytics/insight.min.js
58840000
2169
https://platzi.com/cdn-cgi/bm/cv/669835187/api.js
604800000
9721
Reduce JavaScript execution time — 4.9 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
2539.576
2411.188
49.372
https://platzi.com/
1113.056
40.372
18.516
Unattributable
522.26
4.948
0.732
https://platzi.com/cdn-cgi/bm/cv/669835187/api.js
437.992
428.94
3.808
https://configusa.veinteractive.com/scripts/5.0/capture-apps-5.0.0.js
420.432
374.076
20.912
https://www.googletagmanager.com/gtm.js?id=GTM-MPT6TFW
416.292
372.152
30.8
https://www.google-analytics.com/plugins/ua/ecommerce.js
192.04
124.292
1.872
https://www.googletagmanager.com/gtag/js?id=AW-759649979
176.592
158.148
12.604
https://www.google-analytics.com/analytics.js
163.576
106.14
31.412
https://connect.facebook.net/signals/config/1545967215651797?v=2.9.33&r=stable
159.9
131.956
20.888
https://www.googletagmanager.com/gtag/js?id=G-6CP8Y3QSZQ&l=dataLayer&cx=c
133.396
114.092
14.96
https://cdnjs.cloudflare.com/ajax/libs/lazysizes/5.2.0/lazysizes.min.js
129.112
35.576
3.064
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
122.356
13.088
48.34
https://www.google-analytics.com/gtm/js?id=OPT-NZ7TXPP&t=gtm7&cid=1512291518.1614790455
108.992
90.776
13.636
https://configusa.veinteractive.com/scripts/shared/vendor.js
87.152
70.82
7.648
https://static.platzi.com/mf-landings/assets/common.a608f3747bb0e06a5579.js
86.592
12.048
41.916
https://connect.facebook.net/en_US/fbevents.js
64.76
53.152
8.256
https://configusa.veinteractive.com/scripts/shared/iframeStorage-5.0.0.html?iframeid=ve-storage-iframe&journeyCode=4ab4fc2a-3564-4f69-91ed-a8b48d732acb&journeyId=16273
57.66
16.492
5.824
Minimize main-thread work — 7.3 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Script Evaluation
4708.556
Other
1011.46
Style & Layout
537.976
Script Parsing & Compilation
414.416
Rendering
373.308
Garbage Collection
132.3
Parse HTML & CSS
102.94
Reduce the impact of third-party code — Third-party code blocked the main thread for 570 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
156910
214.996
128433
178.5
62329
121.764
98223
53.188
36306
0
25172
0
13963
0
9488
0
6930
0
4633
0
4437
0
4428
0
3541
0
2344
0
1571
0
461
0
Does not use passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Source
Image elements do not have explicit `width` and `height`
Set an explicit width and height on image elements to reduce layout shifts and improve CLS.
URL Failing Elements
https://static.platzi.com/media/promos/Banner-logo_1_1.png
https://platzistaging.s3-us-west-2.amazonaws.com/commons/assets/image/isotipoPlatzi442ccc1186a9806e18c9889cc301ffe1.png
https://platzistaging.s3-us-west-2.amazonaws.com/commons/assets/image/logotipo-platzi768799552e5f26369e21a807b8a533f7.png
https://static.platzi.com/media/achievements/badge-webpack-3e3867f2-5bcf-4a7e-9af2-cf735850a791.png
https://static.platzi.com/media/achievements/badge-cpmunicacion-marketing-marcas-2dd8653f-cc7e-4345-a1b3-a8076116ff72.png
https://static.platzi.com/media/achievements/badge-automatizacion-marketing-digital-fb0327bc-e341-444c-9914-76059aa4ba85.png
https://static.platzi.com/media/achievements/badge-go-57d6b6ee-c9de-4d9e-9e2c-29a0c879748d-1859b16d-1c87-4b38-bf0a-aee1256cc355.webp
https://static.platzi.com/mf-landings/image/agenda_icon@2x-f9f5698196f2dc60648d97b97bf4b27b.png
IBM
93

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of platzi.com. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`button`, `link`, and `menuitem` elements have accessible names
When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
`[aria-hidden="true"]` is not present on the document `<body>`
Assistive technologies, like screen readers, work inconsistently when `aria-hidden="true"` is set on the document ``.
`[aria-hidden="true"]` elements do not contain focusable descendents
Focusable descendents within an `aria-hidden="true"]` element prevent those interactive elements from being available to users of assistive technologies like screen readers. [.
ARIA input fields have accessible names
When an input field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
ARIA `meter` elements have accessible names
When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
ARIA `progressbar` elements have accessible names
When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
When a toggle field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
ARIA `tooltip` elements have accessible names
When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
ARIA `treeitem` elements have accessible names
When an element doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
The value of an ARIA ID must be unique to prevent other instances from being overlooked by assistive technologies.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Form fields with multiple labels can be confusingly announced by assistive technologies like screen readers which use either the first, the last, or all of the labels.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Platzi.com may provide assistance to deaf or hearing-impaired users with captions on videos.

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.
Failing Elements

Navigation

`[id]` attributes on active, focusable elements are not unique
All focusable elements must have a unique `id` to ensure that they're visible to assistive technologies.
Failing Elements
Heading elements are not in a sequentially-descending order
Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies.
Failing Elements

Names and labels

Links do not have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
67

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that platzi.com should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids front-end JavaScript libraries with known security vulnerabilities
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Fonts with `font-display: optional` are preloaded
Preload `optional` fonts so first-time visitors may use them. Learn More

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
A character encoding declaration is required. It can be done with a `<meta>` tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
React
Lo-Dash
4.17.20
core-js
core-js-pure@3.9.0; core-js-pure@3.0.0
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
No issues in the `Issues` panel in Chrome Devtools
Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL Request Resolution
http://platzi.com/
Allowed
Links to cross-origin destinations are unsafe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.

Audits

Serves images with low resolution
Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity.
URL Displayed size Actual size Expected size
https://static.platzi.com/media/promos/Banner-logo_1_1.png
280 x 65
280 x 65
560 x 130
https://platzistaging.s3-us-west-2.amazonaws.com/commons/assets/image/logotipo-platzi768799552e5f26369e21a807b8a533f7.png
52 x 25
103 x 50
104 x 50

Audits

Registers an `unload` listener
The `unload` event does not fire reliably and listening for it can prevent browser optimizations like the Back-Forward Cache. Consider using the `pagehide` or `visibilitychange` events instead. Learn More
Source
Browser errors were logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
Source Description
Failed to load resource: net::ERR_BLOCKED_BY_CLIENT.Inspector
Failed to load resource: net::ERR_BLOCKED_BY_CLIENT.Inspector
Failed to load resource: the server responded with a status of 403 (Forbidden)
Missing source maps for large first-party JavaScript
Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits.
URL Map URL
https://static.platzi.com/mf-landings/assets/vendor.1cf9513bb0f64a3ddde3.js
https://static.platzi.com/mf-landings/assets/dll.08dfc6f7c6e6db17d7fe.js
https://static.platzi.com/mf-landings/assets/common.a608f3747bb0e06a5579.js
https://cdnjs.cloudflare.com/ajax/libs/autotrack/2.4.1/autotrack.js
https://cdnjs.cloudflare.com/ajax/libs/autotrack/2.4.1/autotrack.js.map
91

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for platzi.com. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of platzi.com on mobile screens.
Document uses legible font sizes — 100% legible text
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Source Selector % of Page Text Font Size
100.00%
≥ 12px

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Crawling and Indexing

Links are not crawlable
Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn More

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
42

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of platzi.com. This includes details about web app manifests.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of platzi.com on mobile screens.

Installable

Web app manifest or service worker do not meet the installability requirements — 1 reason
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
Failure reason
No manifest was fetched

PWA Optimized

Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
A maskable icon ensures that the image fills the entire shape without being letterboxed when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Hosting

Server Location

Server IP Address: 104.17.175.85
Continent: North America
Country: United States
United States Flag
Region:
City:
Longitude: -97.822
Latitude: 37.751
Currencies: USD
USN
USS
Languages: English

Web Hosting Provider

Name IP Address
Cloudflare, Inc.
Registration

Domain Registrant

Private Registration: No
Name:
Organization: Cloudflare, Inc.
Country: US
City: wafangdian
State: VA
Post Code:
Email:
Phone:
Note: Registration information is derived from various sources and may be inaccurate.

Domain Registrar

Name IP Address
NAMECHEAP INC 104.16.100.56
Security

Visitor Safety

Mature Content: Not Likely
McAfee WebAdvisor Rating: Safe
WOT Rating: 3.8/5
WOT Trustworthiness: 76/100
WOT Child Safety: 94/100
Note: Safety information is not guaranteed.

SSL/TLS Certificate

Issued To: platzi.com
Issued By: Cloudflare Inc ECC CA-3
Valid From: 1st October, 2020
Valid To: 1st October, 2021
Subject: CN = platzi.com
O = Cloudflare, Inc.
L = San Francisco
S = US
Hash: 021476dd
Issuer: CN = Cloudflare Inc ECC CA-3
O = Cloudflare, Inc.
S = US
Version: 2
Serial Number: 10401918344317394477360822682167343819
Serial Number (Hex): 07D3562B89C309AD677CD0FC7A10FACB
Valid From: 1st October, 2023
Valid To: 1st October, 2023
Signature Algorithm (Short Name): ecdsa-with-SHA256
Signature Algorithm (Long Name): ecdsa-with-SHA256
Authority Key Identifier: keyid:A5:CE:37:EA:EB:B0:75:0E:94:67:88:B4:45:FA:D9:24:10:87:96:1F
Extended Key Usage: TLS Web Server Authentication, TLS Web Client Authentication
CRL Distribution Points:
Full Name:
URI:http://crl3.digicert.com/CloudflareIncECCCA-3.crl

Full Name:
URI:http://crl4.digicert.com/CloudflareIncECCCA-3.crl

Certificate Policies: Policy: 2.16.840.1.114412.1.1
CPS: https://www.digicert.com/CPS
Policy: 2.23.140.1.2.2

Authority Information Access: OCSP - URI:http://ocsp.digicert.com
CA Issuers - URI:http://cacerts.digicert.com/CloudflareIncECCCA-3.crt

SCT List: Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : F6:5C:94:2F:D1:77:30:22:14:54:18:08:30:94:56:8E:
E3:4D:13:19:33:BF:DF:0C:2F:20:0B:CC:4E:F1:64:E3
Timestamp : Oct 1 00:43:24.488 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:20:5F:44:A9:B5:D0:35:DC:63:89:98:05:5E:
B9:B8:4E:85:EC:02:4E:83:89:5E:EF:7C:EF:D2:E1:54:
B0:5E:51:CA:02:21:00:C5:B5:25:84:01:BD:11:08:85:
6D:0D:69:4C:8E:DB:77:6C:A7:E8:7B:8C:61:B3:52:72:
6C:3A:5C:58:22:6A:EC
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 5C:DC:43:92:FE:E6:AB:45:44:B1:5E:9A:D4:56:E6:10:
37:FB:D5:FA:47:DC:A1:73:94:B2:5E:E6:F6:C7:0E:CA
Timestamp : Oct 1 00:43:24.558 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:20:04:B8:5B:83:4B:94:77:15:75:8A:2C:60:
71:CF:DF:B8:98:B3:3D:AB:B0:9B:59:31:7C:E4:3D:45:
2F:44:FA:E5:02:21:00:EC:C4:71:7C:0B:14:B8:72:DC:
C6:C5:27:7E:AE:BC:E4:87:17:4A:84:A2:41:FD:6A:D3:
43:04:E3:93:0C:BD:CC
Key Usage: Digital Signature
Basic Constraints: CA:FALSE
Subject Alternative Name: DNS:*.hello.platzi.com
DNS:*.notifications.platzi.com
DNS:*.platzi.com
DNS:*.qa.platzi.com
DNS:platzi.com
DNS:*.staging.platzi.com
Technical

DNS Lookup

HTTP Response Headers

HTTP-Code: HTTP/1.1 200 OK
Date: 3rd March, 2021
Content-Type: text/html
Cache-Control: no-store
Server: cloudflare
Connection: keep-alive
Set-Cookie: *
CF-Ray: 62a461b55903e760-EWR
Access-Control-Allow-Origin: *
Strict-Transport-Security: max-age=2592000; includeSubDomains; preload
Vary: Accept-Encoding
CF-Cache-Status: DYNAMIC
Access-Control-Allow-Credentials: true
Access-Control-Allow-Headers: X-Requested-With,content-type,X-CSRFToken
Access-Control-Allow-Methods: GET, POST
cf-request-id: 089a9b65540000e7606595a000000001
Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
X-Content-Type-Options: nosniff
X-DNS-Prefetch-Control: off
X-Download-Options: noopen
X-Frame-Options: SAMEORIGIN
X-Permitted-Cross-Domain-Policies: none
X-XSS-Protection: 1; mode=block

Whois Lookup

Created: 7th January, 2013
Changed: 25th January, 2018
Expires: 7th January, 2023
Registrar: NAMECHEAP INC
Status: clientTransferProhibited
Nameservers: lady.ns.cloudflare.com
tom.ns.cloudflare.com
Owner Name: WhoisGuard Protected
Owner Organization: WhoisGuard, Inc.
Owner Street: P.O. Box 0823-03411
Owner Post Code: 0
Owner City: Panama
Owner State: Panama
Owner Country: PA
Owner Phone: +507.8365503
Owner Email: 82621654b544488a87229260da514e29.protect@whoisguard.com
Admin Name: WhoisGuard Protected
Admin Organization: WhoisGuard, Inc.
Admin Street: P.O. Box 0823-03411
Admin Post Code: 0
Admin City: Panama
Admin State: Panama
Admin Country: PA
Admin Phone: +507.8365503
Admin Email: 82621654b544488a87229260da514e29.protect@whoisguard.com
Tech Name: WhoisGuard Protected
Tech Organization: WhoisGuard, Inc.
Tech Street: P.O. Box 0823-03411
Tech Post Code: 0
Tech City: Panama
Tech State: Panama
Tech Country: PA
Tech Phone: +507.8365503
Tech Email: 82621654b544488a87229260da514e29.protect@whoisguard.com

Nameservers

Name IP Address
lady.ns.cloudflare.com 173.245.58.127
tom.ns.cloudflare.com 108.162.193.147
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