HTML5test Alternatives

The Acid3 Test is an online test page developed by the Web Standards Project to help everyone check how compliant a specific browser is with different web standards like JavaScript and Document Object Model.

Compatibility tables for support of HTML5, CSS3, SVG and more in desktop and mobile browsers.

Open Source

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Browser Testing made simple! Run automated, visual, and manual tests on 1500+ real browsers and mobile devices. Test more browsers, in less time.

webcheck.me Free online website scanner. Checks security, seo, performance and mail problems.

spacedesk expands the Windows desktop computer screen to other computers over the local area...

Automated and Manual Browser and Device testing.

freemium $20.0 / Monthly (Unlimited Live Testing)

ietester is an application that allows to test on multiple ie versions at the same time in the same application

BrowserStack is a software testing platform for developers to comprehensively test websites and mobile applications for quality.

Open Source freemium $29.0 / Monthly (Starts at single user plans and billed annually)

Test mobile or web apps instantly across 700+ browser/OS/device platform combinations - without infrastructure setup.

Live interactive cross-browser testing from your browser.

Browsershots makes screenshots of your web design in different browsers.

Reddit gives you the best of the internet in one place. Get a constantly updating feed of breaking news, fun stories, pics, memes, and videos just for you.

litmus tests and tracks your email campaigns, so you can always put your best design forward.