The HTML5 test - How well does your browser support HTML5?
The HTML5 test is a benchmarking tool that measures how comprehensively a web browser supports HTML5 features and related W3C specifications by assigning point values to detected capabilities. While it doesn't exhaustively test every HTML5 feature or their complete functionality, it provides a quantifiable comparison across browsers to indicate manufacturer investment in web platform development. The test continually evolves to include emerging specifications alongside the official HTML5 recommendation, with scores reflecting support for both stable and draft-stage standards.