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openstax.org screenshot

Report Summary

  • 26

    Performance

    Renders faster than
    46% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 96

    SEO

    Google-friendlier than
    91% of websites

openstax.org

OpenStax

Page Load Speed

1.1 sec in total

First Response

79 ms

Resources Loaded

812 ms

Page Rendered

223 ms

openstax.org screenshot

About Website

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

OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!

Visit openstax.org

Key Findings

We analyzed Openstax.org page load time and found that the first response time was 79 ms and then it took 1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

openstax.org performance score

26

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

73/100

10%

LCP (Largest Contentful Paint)

Value13.1 s

0/100

25%

SI (Speed Index)

Value15.5 s

0/100

10%

TBT (Total Blocking Time)

Value1,190 ms

21/100

30%

CLS (Cumulative Layout Shift)

Value0.161

72/100

15%

TTI (Time to Interactive)

Value11.7 s

18/100

10%

Network Requests Diagram

openstax.org

79 ms

normalize-6197e73d.css

35 ms

all-3054cbbf.css

61 ms

all-6ad6f7e3.js

149 ms

eedb4ec4-ad5c-4ac3-afc0-fcb20b4b69ba.css

57 ms

Our browser made a total of 24 requests to load all elements on the main page. We found that 42% of them (10 requests) were addressed to the original Openstax.org, 17% (4 requests) were made to Fast.fonts.net and 13% (3 requests) were made to S.ytimg.com. The less responsive or slowest element that took the longest time to load (528 ms) belongs to the original domain Openstax.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 468.8 kB (62%)

Content Size

755.1 kB

After Optimization

286.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Openstax.org main page is 755.1 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. 60% of websites need less resources to load. Javascripts take 363.0 kB which makes up the majority of the site volume.

HTML Optimization

-65%

Potential reduce by 3.2 kB

  • Original 4.9 kB
  • After minification 4.3 kB
  • After compression 1.7 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. This page needs HTML code to be minified as it can gain 634 B, which is 13% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 3.2 kB or 65% of the original size.

Image Optimization

-9%

Potential reduce by 10.6 kB

  • Original 120.3 kB
  • After minification 109.7 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. Open Stax images are well optimized though.

JavaScript Optimization

-64%

Potential reduce by 233.2 kB

  • Original 363.0 kB
  • After minification 362.9 kB
  • After compression 129.8 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 233.2 kB or 64% of the original size.

CSS Optimization

-83%

Potential reduce by 221.8 kB

  • Original 266.9 kB
  • After minification 266.5 kB
  • After compression 45.1 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. Openstax.org needs all CSS files to be minified and compressed as it can save up to 221.8 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (44%)

Requests Now

18

After Optimization

10

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 18 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Open Stax. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

openstax.org

openstax.org

79 ms

normalize-6197e73d.css

normalize-6197e73d.css

35 ms

all-3054cbbf.css

all-3054cbbf.css

61 ms

all-6ad6f7e3.js

all-6ad6f7e3.js

149 ms

eedb4ec4-ad5c-4ac3-afc0-fcb20b4b69ba.css

eedb4ec4-ad5c-4ac3-afc0-fcb20b4b69ba.css

57 ms

analytics.js

analytics.js

32 ms

student_js-f2bc2c7d.jpg

student_js-f2bc2c7d.jpg

528 ms

os_logo_horizontal-2-479c033c.png

os_logo_horizontal-2-479c033c.png

353 ms

os_college_logo-bb402b73.png

os_college_logo-bb402b73.png

44 ms

os_cnx_logo-0bfbf524.png

os_cnx_logo-0bfbf524.png

338 ms

os_tutor_logo-fa739d64.png

os_tutor_logo-fa739d64.png

82 ms

rice-logo-glow-f3d96717.png

rice-logo-glow-f3d96717.png

216 ms

2cac77ec-9bc0-4ee7-87e4-27650190744f.woff

2cac77ec-9bc0-4ee7-87e4-27650190744f.woff

60 ms

939cba03-5b40-4d01-9bc5-7589eca863db.woff

939cba03-5b40-4d01-9bc5-7589eca863db.woff

133 ms

7147ec3a-8ff8-4ec9-8c5c-bd1571dc6ae6.woff

7147ec3a-8ff8-4ec9-8c5c-bd1571dc6ae6.woff

93 ms

g1NCL47P-Ug

g1NCL47P-Ug

110 ms

collect

collect

15 ms

www-embed-player-vflfNyN_r.css

www-embed-player-vflfNyN_r.css

40 ms

www-embed-player.js

www-embed-player.js

67 ms

base.js

base.js

106 ms

Tqng9ngJVK4Gqvh3e602hP-HqlN49KFEUSDtmrOPmWo.js

Tqng9ngJVK4Gqvh3e602hP-HqlN49KFEUSDtmrOPmWo.js

78 ms

ad_status.js

ad_status.js

73 ms

zN7GBFwfMP4uA6AR0HCoLQ.ttf

zN7GBFwfMP4uA6AR0HCoLQ.ttf

117 ms

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

117 ms

Accessibility Review

openstax.org accessibility score

100

Accessibility Issues

Best Practices

openstax.org best practices score

83

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

Page has valid source maps

SEO Factors

openstax.org SEO score

96

Search Engine Optimization Advices

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Openstax.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Openstax.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

openstax.org

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