HTML5 Support Test

Quickly test which HTML5 & modern web platform features your browser supports.
Overall result
Running tests…
This runs feature-detection in your browser only.
localStorage
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sessionStorage
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IndexedDB
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Canvas 2D
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WebGL
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WebGPU
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HTMLVideo element
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HTMLAudio element
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Picture / srcset
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ES6 (let/const, arrow)
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WebAssembly
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Web Workers
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Fetch API
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Service Worker
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Cache API
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Drag & Drop
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Pointer Events
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Fullscreen API
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getUserMedia
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WebRTC
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WebSocket
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Clipboard API
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Permissions API
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History API
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CSS Grid
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Flexbox
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CSS Variables
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Notes: These tests are best-effort feature detections performed in the browser. Some features (e.g., codec support) are reported as “probably” supported based on feature checks — codec availability can vary by platform and installed codecs.

What Is HTML5?

HTML5 is the latest major version of the HyperText Markup Language (HTML), the standard language used to structure content on the web. HTML5 introduces modern features for multimedia, graphics, offline storage, performance, and improved semantics—without requiring extra plugins like Flash or Silverlight.

Key HTML5 enhancements include:

  • Built-in audio and video support
  • Canvas 2D drawing and WebGL for graphics
  • LocalStorage & sessionStorage for offline data
  • New semantic tags (header, nav, section, article, footer)
  • Improved forms and input types
  • Geolocation API
  • WebSockets for real-time communication

What an HTML5 Support Test Checks

An HTML5 Support Test evaluates whether your browser supports modern web technologies.

  • Video formats: MP4, WebM, Ogg
  • Audio formats: MP3, AAC, WAV, Ogg
  • Canvas drawing & 2D rendering
  • WebGL or WebGL2 support
  • LocalStorage, sessionStorage, IndexedDB
  • Geolocation API
  • WebSockets & Server-Sent Events
  • Input types: date, email, number, range, color, etc.
  • Drag-and-drop API
  • Browser support for semantic HTML5 tags

Different browsers support different subsets of HTML5 features depending on version, platform, and rendering engine.

Why HTML5 Support Matters

HTML5 compatibility is important because it affects:

  • Website performance and speed
  • Browser compatibility for modern apps
  • Video and audio playback support
  • Game and graphics rendering capability
  • Offline browsing features
  • Security and stability

Many modern web applications rely on HTML5 APIs to function properly—if your browser lacks support, features may fail or be downgraded.

Why Use an HTML5 Support Test?

A Test helps you understand:

  • What HTML5 features your browser supports
  • Whether you can run modern websites or web apps
  • If you need to update your browser
  • Compatibility for audio, video, games, and 3D graphics
  • Whether your device is suitable for development or testing