HTML5 Compatibility

What Is HTML5 Compatibility Check?

The HTML5 compatibility check tool tests your current browser against 22 common HTML5 and modern web APIs, including Canvas, WebGL, WebRTC, WebSocket, Fetch, Promise, IndexedDB, Geolocation, CSS Grid, Flexbox and ES6 Modules. The test runs locally and reflects only the browser environment of the current device, listing each feature as supported or not in a clear table.

Main Features

• Covers 22 commonly used HTML5 / modern web API checks
• Per-feature ✓ / ✗ results with a short description
• Totals for supported, unsupported and overall checks
• Copy the full results with one click for archiving or debugging
• Detection starts automatically when the page opens

Use Cases / Notes

Useful for confirming target browser capabilities before building a page, diagnosing why a feature is unavailable, or comparing devices. The result only reflects the browser on this device; different browsers or OS versions may differ.

How to Use

1. Open the page and the detection starts automatically
2. Review each feature's status and description in the table
3. Click “Copy” to save the result text for reference