HTML5 Test Your Web Browser

Martin Brinkmann
Jun 6, 2010
Updated • Feb 23, 2015

Most Internet users who read about HTML5 and how it is going to change the web might think it is all about HTML5 video as the controversy surrounding it was all over the news lately.

But HTML5 promises more than just a new video web standard, it introduces several new elements and attributes while getting rid of obsolete ones.

There are not a lot of websites that make use of HTML5 yet. Some video portals like YouTube began to use HTML5 video as an alternative to the common Flash video player, and some webmasters have begun to experiment with HTML5 on their websites but it is a minority for now that have implemented HTML5 elements on life pages or sites.

Most Internet users might not even see a difference yet except for the fact that they will experience error messages if their web browser is not supporting HTML5 elements used on websites if not properly implemented.

But how do you know if your Internet browser is capable of displaying HTML5 elements correctly?

The answer is the HTML5 Test:

The HTML5 test tests the HTML5 capabilities of every web browser. Simply load the url in a browser and the test will display a result score and in depth information about specific HTML5 elements and their score.

Test results are color coded and range from great to non-existent.

Firefox 3.6.4


Google Chrome 6.0.422.0

google chrome
google chrome html5 test


Opera 10.60

opera 10.60
opera 10.60 html5 test


Internet Explorer 9 Platform Preview 2

internet explorer9
internet explorer 9 html5 test

Google Chrome ranks best in the HTML5 test with a score of 142 of 160 followed by Opera with a score of 102 of 160, Firefox with 101 points and Internet Explorer 9 Platform preview 2 with 19 out of 160.

The developer of the test, Niels Leenheer, is currently working on an extended test that is available as a beta version.

The test results in the HTMl5 beta test are as follows:

  • Firefox 3.6.4: 139 points, 4 bonus points out of 300
  • Google Chrome 6 dev: 212 points, 10 bonus points out of 300
  • Opera 10.60: 129 points, 4 bonus points out of 300
  • Internet Explorer 9 platform preview 2: Broken

No browser currently supports all HTML5 elements. Google Chrome developers are far ahead of the other developers currently. Firefox and Opera compete at the same level and Internet Explorer 9 is not ready yet. It should however be noted that the Microsoft browser is offered in an early platform preview and that the developer's have mentioned that HTML5 element support will be added in later platform previews of the browser.


We have shown you how to test the HTML5 capabilities of any web browser. It will be interesting to see how the browser developers tackle the challenges that lie ahead to provide their users with an error-free browsing environment.

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  1. ilev said on August 4, 2012 at 7:53 pm

    Doesn’t Windows 8 know that www. or http:// are passe ?

    1. Martin Brinkmann said on August 4, 2012 at 7:57 pm

      Well it is a bit difficulty to distinguish between domains and files for instance.

    2. Leonidas Burton said on September 4, 2023 at 4:51 am

      I know a service made by google that is similar to Google bookmarks.

  2. VioletMoon said on August 16, 2023 at 5:26 pm

    @Ashwin–Thankful you delighted my comment; who knows how many “gamers” would have disagreed!

  3. Karl said on August 17, 2023 at 10:36 pm


    The comments section under this very article (3 comments) is identical to the comments section found under the following article:

    Not sure what the issue is, but have seen this issue under some other articles recently but did not report it back then.

  4. Anonymous said on August 25, 2023 at 11:44 am

    Omg a badge!!!
    Some tangible reward lmao.

    It sucks that redditors are going to love the fuck out of it too.

  5. Scroogled said on August 25, 2023 at 10:57 pm

    With the cloud, there is no such thing as unlimited storage or privacy. Stop relying on these tech scums. Purchase your own hardware and develop your own solutions.

    1. lollmaoeven said on August 27, 2023 at 6:24 am

      This is a certified reddit cringe moment. Hilarious how the article’s author tries to dress it up like it’s anything more than a png for doing the reddit corporation’s moderation work for free (or for bribes from companies and political groups)

  6. El Duderino said on August 25, 2023 at 11:14 pm

    Almost al unlmited services have a real limit.

    And this comment is written on the dropbox article from August 25, 2023.

  7. John G. said on August 26, 2023 at 1:29 am

    First comment > @ilev said on August 4, 2012 at 7:53 pm

    For the God’s sake, fix the comments soon please! :[

  8. Kalmly said on August 26, 2023 at 4:42 pm

    Yes. Please. Fix the comments.

  9. Kim Schmidt said on September 3, 2023 at 3:42 pm

    With Google Chrome, it’s only been 1,500 for some time now.

    Anyone who wants to force me in such a way into buying something that I can get elsewhere for free will certainly never see a single dime from my side. I don’t even know how stupid their marketing department is to impose these limits on users instead of offering a valuable product to the paying faction. But they don’t. Even if you pay, you get something that is also available for free elsewhere.

    The algorithm has also become less and less savvy in terms of e.g. English/German translations. It used to be that the bot could sort of sense what you were trying to say and put it into different colloquialisms, which was even fun because it was like, “I know what you’re trying to say here, how about…” Now it’s in parts too stupid to translate the simplest sentences correctly, and the suggestions it makes are at times as moronic as those made by Google Translations.

    If this is a deep-learning AI that learns from users’ translations and the phrases they choose most often – which, by the way, is a valuable, moneys worthwhile contribution of every free user to this project: They invest their time and texts, thereby providing the necessary data for the AI to do the thing as nicely as they brag about it in the first place – alas, the more unprofessional users discovered the translator, the worse the language of this deep-learning bot has become, the greater the aggregate of linguistically illiterate users has become, and the worse the language of this deep-learning bot has become, as it now learns the drivel of every Tom, Dick and Harry out there, which is why I now get their Mickey Mouse language as suggestions: the inane language of people who can barely spell the alphabet, it seems.

    And as a thank you for our time and effort in helping them and their AI learn, they’ve lowered the limit from what was once 5,000 to now 1,500…? A big “fuck off” from here for that! Not a brass farthing from me for this attitude and behaviour, not in a hundred years.

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