Tools & Wizards About Us
developers.facebook.com screenshot

Report Summary

  • 26

    Performance

    Renders faster than
    46% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 57% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

developers.facebook.com

Meta for Developers

Page Load Speed

1.9 sec in total

First Response

213 ms

Resources Loaded

1.3 sec

Page Rendered

425 ms

developers.facebook.com screenshot

About Website

Visit developers.facebook.com now to see the best up-to-date Developers Facebook content for United States and also check out these interesting facts you probably never knew about developers.facebook.com

Code to connect people with Facebook for Developers. Explore AI, business tools, gaming, open source, publishing, social hardware, social integration, and virtual reality. Learn about Facebook’s globa...

Visit developers.facebook.com

Key Findings

We analyzed Developers.facebook.com page load time and found that the first response time was 213 ms and then it took 1.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

developers.facebook.com performance score

26

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

49/100

10%

LCP (Largest Contentful Paint)

Value5.9 s

14/100

25%

SI (Speed Index)

Value6.2 s

43/100

10%

TBT (Total Blocking Time)

Value740 ms

40/100

30%

CLS (Cumulative Layout Shift)

Value0.927

3/100

15%

TTI (Time to Interactive)

Value12.9 s

13/100

10%

Network Requests Diagram

developers.facebook.com

213 ms

fbevents.js

194 ms

tr

115 ms

hSuB683w7x7.css

233 ms

jTuqQ-OPDr6.css

278 ms

Our browser made a total of 67 requests to load all elements on the main page. We found that 3% of them (2 requests) were addressed to the original Developers.facebook.com, 49% (33 requests) were made to Static.xx.fbcdn.net and 24% (16 requests) were made to Facebook.com. The less responsive or slowest element that took the longest time to load (803 ms) relates to the external source Scontent.xx.fbcdn.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 86.8 kB (12%)

Content Size

749.1 kB

After Optimization

662.3 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Developers.facebook.com main page is 749.1 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 55% of websites need less resources to load. Images take 672.6 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 41.0 kB

  • Original 55.5 kB
  • After minification 54.6 kB
  • After compression 14.6 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 41.0 kB or 74% of the original size.

Image Optimization

-7%

Potential reduce by 45.8 kB

  • Original 672.6 kB
  • After minification 626.8 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Developers Facebook images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 50 B

  • Original 21.0 kB
  • After minification 21.0 kB
  • After compression 20.9 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

Requests Breakdown

Number of requests can be reduced by 42 (74%)

Requests Now

57

After Optimization

15

  • Images
  • JavaScript
  • CSS

The browser has sent 57 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Developers Facebook. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

developers.facebook.com

developers.facebook.com

213 ms

fbevents.js

fbevents.js

194 ms

tr

tr

115 ms

hSuB683w7x7.css

hSuB683w7x7.css

233 ms

jTuqQ-OPDr6.css

jTuqQ-OPDr6.css

278 ms

cMg1NADyTLV.css

cMg1NADyTLV.css

360 ms

cExaeQ07vMA.css

cExaeQ07vMA.css

393 ms

hzAbnp0y84k.css

hzAbnp0y84k.css

359 ms

n370yiaI2G6.css

n370yiaI2G6.css

355 ms

_rx8naC75Dy.js

_rx8naC75Dy.js

430 ms

12056999_527586047417155_1427094715_n.jpg

12056999_527586047417155_1427094715_n.jpg

556 ms

12056942_504542496383313_589124126_n.png

12056942_504542496383313_589124126_n.png

621 ms

12056974_1139692222715512_2137855326_n.png

12056974_1139692222715512_2137855326_n.png

636 ms

12057195_850865451695022_1842957663_n.png

12057195_850865451695022_1842957663_n.png

664 ms

12057222_917248651693816_519438459_n.png

12057222_917248651693816_519438459_n.png

673 ms

12057004_982192548504015_1573584927_n.png

12057004_982192548504015_1573584927_n.png

677 ms

12624062_876790125771359_1683950322_n.jpg

12624062_876790125771359_1683950322_n.jpg

751 ms

12056981_500844813416602_1022231969_n.png

12056981_500844813416602_1022231969_n.png

677 ms

11891357_1061720347212845_584378441_n.png

11891357_1061720347212845_584378441_n.png

780 ms

11891349_532301260256232_831298041_n.png

11891349_532301260256232_831298041_n.png

751 ms

12056959_495734753934070_457844252_n.png

12056959_495734753934070_457844252_n.png

803 ms

22 ms

41 ms

60 ms

62 ms

171 ms

48 ms

49 ms

49 ms

50 ms

51 ms

60 ms

191 ms

191 ms

77 ms

80 ms

AeVtnX55bMN.png

AeVtnX55bMN.png

59 ms

css;base64,

css;base64,

8 ms

Qs8JpkaZZWn.css

Qs8JpkaZZWn.css

59 ms

cCIltMJutxu.css

cCIltMJutxu.css

92 ms

DDA9IDzfTif.css

DDA9IDzfTif.css

55 ms

8AIaACgBqQAkAhYALQHJAEYCwQBaAAAAAAIbACU=

8AIaACgBqQAkAhYALQHJAEYCwQBaAAAAAAIbACU=

5 ms

A9sayBn2IEF.otf

A9sayBn2IEF.otf

207 ms

xA32tpmseVi.otf

xA32tpmseVi.otf

206 ms

M0ebpfLaTZg.otf

M0ebpfLaTZg.otf

203 ms

Kg3pu66YGCS.otf

Kg3pu66YGCS.otf

294 ms

p9LHntgACi6.otf

p9LHntgACi6.otf

270 ms

_4VXT2T370W.otf

_4VXT2T370W.otf

293 ms

SymU9cWhbPZ.css

SymU9cWhbPZ.css

142 ms

fb4d_logo-2x.png

fb4d_logo-2x.png

66 ms

analytics.js

analytics.js

62 ms

dhgMZwEiqyE.js

dhgMZwEiqyE.js

43 ms

x5F9OMjKyLw.js

x5F9OMjKyLw.js

44 ms

rFmE1g6Dkoz.js

rFmE1g6Dkoz.js

87 ms

WJAz9zZvW15.js

WJAz9zZvW15.js

60 ms

7cm7D75Y0Sf.js

7cm7D75Y0Sf.js

59 ms

JMI5tmJvZMw.js

JMI5tmJvZMw.js

59 ms

rw3bEcylZVO.js

rw3bEcylZVO.js

105 ms

336JejShbZp.js

336JejShbZp.js

103 ms

TTCre3391I0.js

TTCre3391I0.js

105 ms

DusqSB58d-B.js

DusqSB58d-B.js

104 ms

NPuyGQIfUx-.js

NPuyGQIfUx-.js

104 ms

ZNPAadQNc33.js

ZNPAadQNc33.js

147 ms

Q4A0UyjU8W2.js

Q4A0UyjU8W2.js

147 ms

oGpZUCR2pvA.js

oGpZUCR2pvA.js

148 ms

2uEzvJei7cm.js

2uEzvJei7cm.js

148 ms

7A==

7A==

11 ms

Accessibility Review

developers.facebook.com accessibility score

84

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

<frame> or <iframe> elements do not have a title

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

developers.facebook.com best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

developers.facebook.com SEO score

90

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Developers.facebook.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Developers.facebook.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

developers.facebook.com

Open Graph data is detected on the main page of Developers Facebook. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: