HTML5test is a web application for evaluating a web browser's accuracy in implementing the web standards HTML5 and Web SQL Database (developed by the World Wide Web Consortium), as well as the WebGL standard (developed by the Mozilla Foundation and the Khronos Group).[1]

Tizen 2 score.png
Type of site
Software testing
Available inEnglish
OwnerNiels Leenheer
Created byNiels Leenheer
Launched12 March 2010; 10 years ago (2010-03-12)
Current statusOnline
Written inJavaScript

The test suite was developed by Dutch web programmer Niels Leenheer, and published in March 2010.[2] To test a web browser, the user must visit the home page of the website which is located at[3] The application returns an integer score out of a possible 555 points. The point total has changed multiple times through the evolution of the software; Leenheer introduced the present scoring system as part of a major redesign of the test introduced in November 2013.[4]

HTML5test evaluates the browser's support for Web storage, the W3C Geolocation API, HTML5-specific HTML elements (including the canvas element), and other features.[5][6] It does not evaluate a browser's conformance to other web standards, such as Cascading Style Sheets, ECMAScript, Scalable Vector Graphics, or the Document Object Model. Conformance testing for those standards is within the purview of Acid3, an automated test published by Ian Hickson in 2008.[7] Similarly, Acid3 does not evaluate a browser's HTML5 conformance. The test scope of HTML5test and the test scope of Acid3 are mutually exclusive.

As of July 2020, the maximum score is 555 and Google Chrome scores 535, Microsoft Edge 84 scores 532,[8] Falkon 3.1.0 scores 528,[9] Opera 45 scores 518, Mozilla Firefox 68 scores 513, GNOME Web 3.36 scores 432[10] and Internet Explorer 11 scores 312.

See alsoEdit


  1. ^ Leenheer, Niels. "HTML5test Frequently Asked Questions". Niels Leenheer. Retrieved 10 July 2014.
  2. ^ Zeldman, L. Jeffrey (1 August 2010). "HTML5 Test". ISSN 1534-0309. Retrieved 10 July 2014.
  3. ^ Brinkmann, Martin. "HTML5 Test Your Web Browser". gHacks Technology News. Retrieved 10 July 2014.
  4. ^ Leenheer, Niels (13 November 2013). "The new HTML5test is here!". Retrieved 12 July 2014.
  5. ^ Staff writer. "Test Your Browser for HTML5 Compatibility". CyberNet News. Retrieved 10 July 2014.
  6. ^ Zukerman, Erez (8 August 2010). "Test your browser's HTML5 prowess with the HTML5 test". Switched. AOL. Retrieved 10 July 2014.
  7. ^ "Acid3: Putting Browser Makers on Notice, Again" (Press release). Web Standards Project. 3 March 2008. Retrieved 10 July 2014.
  8. ^ "HTML5test - How well does your browser support HTML5?".
  9. ^ "HTML5test - How well does your browser support HTML5?".
  10. ^ "HTML5test - How well does your browser support HTML5?".

External linksEdit