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highlightjs.org screenshot

Report Summary

  • 94

    Performance

    Renders faster than
    93% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 64

    SEO

    Google-friendlier than
    24% of websites

highlightjs.org

highlight.js

Page Load Speed

3.2 sec in total

First Response

245 ms

Resources Loaded

2.3 sec

Page Rendered

666 ms

highlightjs.org screenshot

About Website

Welcome to highlightjs.org homepage info - get ready to check Highlight Js best content for United States right away, or after learning these important things about highlightjs.org

The Internet's favorite JavaScript syntax highlighter supporting Node.js and the web.

Visit highlightjs.org

Key Findings

We analyzed Highlightjs.org page load time and found that the first response time was 245 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

highlightjs.org performance score

94

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.4 s

72/100

10%

LCP (Largest Contentful Paint)

Value2.4 s

92/100

25%

SI (Speed Index)

Value2.4 s

98/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.018

100/100

15%

TTI (Time to Interactive)

Value3.3 s

94/100

10%

Network Requests Diagram

highlightjs.org

245 ms

highlightjs.org

490 ms

styles.css

79 ms

jquery-2.1.1.min.js

24 ms

highlight.pack.js

538 ms

Our browser made a total of 20 requests to load all elements on the main page. We found that 75% of them (15 requests) were addressed to the original Highlightjs.org, 15% (3 requests) were made to Fonts.gstatic.com and 5% (1 request) were made to Code.jquery.com. The less responsive or slowest element that took the longest time to load (538 ms) belongs to the original domain Highlightjs.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 349.6 kB (65%)

Content Size

535.1 kB

After Optimization

185.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Highlightjs.org main page is 535.1 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. 25% of websites need less resources to load. Javascripts take 501.1 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 13.8 kB

  • Original 19.5 kB
  • After minification 19.2 kB
  • After compression 5.7 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. 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 13.8 kB or 71% of the original size.

Image Optimization

-12%

Potential reduce by 42 B

  • Original 344 B
  • After minification 302 B

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. Obviously, Highlight Js needs image optimization as it can save up to 42 B or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-65%

Potential reduce by 326.2 kB

  • Original 501.1 kB
  • After minification 501.1 kB
  • After compression 174.9 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 326.2 kB or 65% of the original size.

CSS Optimization

-67%

Potential reduce by 9.6 kB

  • Original 14.2 kB
  • After minification 10.5 kB
  • After compression 4.6 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. Highlightjs.org needs all CSS files to be minified and compressed as it can save up to 9.6 kB or 67% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (73%)

Requests Now

15

After Optimization

4

  • Images
  • JavaScript
  • CSS

The browser has sent 15 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Highlight Js. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

highlightjs.org

highlightjs.org

245 ms

highlightjs.org

highlightjs.org

490 ms

styles.css

styles.css

79 ms

jquery-2.1.1.min.js

jquery-2.1.1.min.js

24 ms

highlight.pack.js

highlight.pack.js

538 ms

color-brewer.css

color-brewer.css

250 ms

css

css

57 ms

twitter.png

twitter.png

79 ms

0XxGQsSc1g4rdRdjJKZrNC3USBnSvpkopQaUR-2r7iU.ttf

0XxGQsSc1g4rdRdjJKZrNC3USBnSvpkopQaUR-2r7iU.ttf

76 ms

FUDHvzEKSJww3kCxuiAo2A.ttf

FUDHvzEKSJww3kCxuiAo2A.ttf

93 ms

PIPMHY90P7jtyjpXuZ2cLKCWcynf_cDxXwCLxiixG1c.ttf

PIPMHY90P7jtyjpXuZ2cLKCWcynf_cDxXwCLxiixG1c.ttf

123 ms

default.css

default.css

91 ms

solarized-dark.css

solarized-dark.css

78 ms

solarized-light.css

solarized-light.css

78 ms

github.css

github.css

78 ms

railscasts.css

railscasts.css

79 ms

monokai-sublime.css

monokai-sublime.css

78 ms

mono-blue.css

mono-blue.css

79 ms

tomorrow.css

tomorrow.css

78 ms

zenburn.css

zenburn.css

78 ms

Accessibility Review

highlightjs.org accessibility score

83

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

highlightjs.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

SEO Factors

highlightjs.org SEO score

64

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Highlightjs.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 Highlightjs.org main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

highlightjs.org

Open Graph description is not detected on the main page of Highlight Js. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: