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commonlit.org screenshot

Report Summary

  • 39

    Performance

    Renders faster than
    58% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

commonlit.org

Free Online Reading Passages and Literacy Resources

Page Load Speed

1.5 sec in total

First Response

47 ms

Resources Loaded

655 ms

Page Rendered

821 ms

commonlit.org screenshot

About Website

Click here to check amazing Commonlit content for United States. Otherwise, check out these important facts you probably never knew about commonlit.org

CommonLit is a comprehensive literacy program with thousands of reading lessons, full-year ELA curriculum, benchmark assessments, and standards-based data for teachers.

Visit commonlit.org

Key Findings

We analyzed Commonlit.org page load time and found that the first response time was 47 ms and then it took 1.5 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

commonlit.org performance score

39

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.4 s

69/100

10%

LCP (Largest Contentful Paint)

Value5.8 s

16/100

25%

SI (Speed Index)

Value3.6 s

87/100

10%

TBT (Total Blocking Time)

Value1,620 ms

12/100

30%

CLS (Cumulative Layout Shift)

Value0.061

97/100

15%

TTI (Time to Interactive)

Value14.5 s

8/100

10%

Network Requests Diagram

commonlit.org

47 ms

www.commonlit.org

132 ms

108 ms

112 ms

108 ms

Our browser made a total of 67 requests to load all elements on the main page. We found that 6% of them (4 requests) were addressed to the original Commonlit.org, 58% (39 requests) were made to Assets.commonlit.org and 31% (21 requests) were made to O342790.ingest.sentry.io. The less responsive or slowest element that took the longest time to load (213 ms) relates to the external source Assets.commonlit.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 62.0 kB (4%)

Content Size

1.4 MB

After Optimization

1.4 MB

  • HTML
  • Images
  • CSS

In fact, the total size of Commonlit.org main page is 1.4 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 45% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 49.0 kB

  • Original 60.8 kB
  • After minification 60.2 kB
  • After compression 11.8 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 49.0 kB or 81% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 1.3 MB
  • After minification 1.3 MB

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. Commonlit images are well optimized though.

CSS Optimization

-21%

Potential reduce by 13.0 kB

  • Original 62.1 kB
  • After minification 49.3 kB
  • After compression 49.1 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Commonlit.org needs all CSS files to be minified and compressed as it can save up to 13.0 kB or 21% of the original size.

Requests Breakdown

Number of requests can be reduced by 21 (48%)

Requests Now

44

After Optimization

23

  • Images
  • CSS

The browser has sent 44 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Commonlit. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

commonlit.org

commonlit.org

47 ms

www.commonlit.org

www.commonlit.org

132 ms

108 ms

112 ms

108 ms

112 ms

107 ms

113 ms

tailwind-BmCDJOQx.css

tailwind-BmCDJOQx.css

58 ms

application-DZS9RfEk.css

application-DZS9RfEk.css

81 ms

147 ms

139 ms

TopNav-Crq1q7xB.css

TopNav-Crq1q7xB.css

103 ms

cl-button-styles-CaYUcKxO.css

cl-button-styles-CaYUcKxO.css

100 ms

cl-input-styles-DSNxEgvC.css

cl-input-styles-DSNxEgvC.css

101 ms

CLLink-C0rLQYhG.css

CLLink-C0rLQYhG.css

103 ms

CLMenuButton-C03O1sYk.css

CLMenuButton-C03O1sYk.css

106 ms

CLDropdown-k5FNY6lX.css

CLDropdown-k5FNY6lX.css

107 ms

NotifyBell-Cc4pkIY4.css

NotifyBell-Cc4pkIY4.css

105 ms

SignUpModal-Bcnqz2pV.css

SignUpModal-Bcnqz2pV.css

109 ms

CLDisclosure-Cy0ur7mg.css

CLDisclosure-Cy0ur7mg.css

115 ms

CLForm-Drj-d_Rz.css

CLForm-Drj-d_Rz.css

111 ms

CLFormField-BrpkWXQw.css

CLFormField-BrpkWXQw.css

119 ms

CLModal-D9Y5CuQo.css

CLModal-D9Y5CuQo.css

119 ms

styles-B5MgzFxm.css

styles-B5MgzFxm.css

116 ms

cl-tooltip-styles-DBVouAQV.css

cl-tooltip-styles-DBVouAQV.css

122 ms

144 ms

Toaster-CFSpZDtL.css

Toaster-CFSpZDtL.css

159 ms

145 ms

146 ms

138 ms

181 ms

95 ms

96 ms

97 ms

96 ms

2024_EdReports_Badge.svg

2024_EdReports_Badge.svg

31 ms

91 ms

essa_tier_2_logo.svg

essa_tier_2_logo.svg

35 ms

jumbotron-hd.png

jumbotron-hd.png

46 ms

jumbotron-hd-900.png

jumbotron-hd-900.png

39 ms

jumbotron-hd-600.png

jumbotron-hd-600.png

37 ms

jumbotron-hd-500.png

jumbotron-hd-500.png

52 ms

book-icon-teal-CiBqH3h5.svg

book-icon-teal-CiBqH3h5.svg

43 ms

lightbulb-icon-teal.svg

lightbulb-icon-teal.svg

51 ms

star-icon-teal.svg

star-icon-teal.svg

83 ms

accelerate-learning-1-optimized.png

accelerate-learning-1-optimized.png

62 ms

accelerate-learning-2-optimized.png

accelerate-learning-2-optimized.png

84 ms

accelerate-learning-3-optimized.png

accelerate-learning-3-optimized.png

85 ms

close-icon.svg

close-icon.svg

86 ms

final-plea-hd.png

final-plea-hd.png

89 ms

final-plea-hd-900.png

final-plea-hd-900.png

87 ms

final-plea-hd-600.png

final-plea-hd-600.png

94 ms

final-plea-hd-500.png

final-plea-hd-500.png

94 ms

COMMONLIT_LOGO_BLACK.png

COMMONLIT_LOGO_BLACK.png

89 ms

ProfilePicturePhoto_-_J_Lane_%283%29_%281%29.webp

ProfilePicturePhoto_-_J_Lane_%283%29_%281%29.webp

44 ms

43 ms

51 ms

45 ms

Screen_Shot_2022-09-20_at_9.05.27_AM_-_Toni_Scola_%282%29_%281%29.png

Screen_Shot_2022-09-20_at_9.05.27_AM_-_Toni_Scola_%282%29_%281%29.png

116 ms

jessica_r_%281%29.png

jessica_r_%281%29.png

116 ms

teal-pattern-background-BML7XFU6.svg

teal-pattern-background-BML7XFU6.svg

213 ms

white-pattern-background-DC8071AW.svg

white-pattern-background-DC8071AW.svg

118 ms

yellow-blob-Cj9MeXGx.svg

yellow-blob-Cj9MeXGx.svg

20 ms

teal_checkmark--rgvWOmc.png

teal_checkmark--rgvWOmc.png

22 ms

lock-JlFlNCcb.png

lock-JlFlNCcb.png

29 ms

yellow_background_checkmark-DvnHOUKw.svg

yellow_background_checkmark-DvnHOUKw.svg

35 ms

Accessibility Review

commonlit.org accessibility score

100

Accessibility Issues

Best Practices

commonlit.org best practices score

92

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

Missing source maps for large first-party JavaScript

SEO Factors

commonlit.org SEO score

93

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

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 Commonlit.org 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 Commonlit.org 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

commonlit.org

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