Browser Capabilities Tester

A static browser test site for checking browser APIs, media support, graphics capabilities, page context, and user interaction events.

Built with plain HTML, CSS, and JavaScript.

Features

• Media Support: Test image formats, video codecs, and audio format support
• Forms & Input: Check input types and built-in form features
• Security APIs: Check WebAuthn, Web Crypto, and current page security context
• Web APIs: Verify support for storage, device, communication, and performance APIs
• User Data: Display browser, system, network, and preference information exposed by the runtime
• Graphics: Test WebGL, Canvas, CSS, SVG, and font-related capabilities
• Performance: Run lightweight JavaScript and DOM benchmarks
• Accessibility-Related APIs: Check DOM and CSS APIs related to accessibility
• Activity Tracking: Monitor user interactions and browser events on the current page

Technologies

• Plain JavaScript
• HTML5
• CSS3
• Hosted on GitHub Pages

Browser Support

Works in modern browsers that support:

• ES6+ JavaScript
• Modern Web APIs
• HTML5 features

Core Requirements

• Modern JavaScript (ES6+)
• HTML5 and CSS3
• WebGL for graphics testing

Tested Browsers

• Not currently tracked in this repository

API Support

• Geolocation API
• WebAuthn
• Crypto API
• WebGL and Canvas
• IndexedDB and LocalStorage
• Network Information API where available

Security Features

• Current page secure-context state
• Current page cross-origin isolation state
• HTTPS page load state
• Web Crypto algorithm availability

Notes

• Results reflect the current browser and page context. Some checks are affected by HTTPS, permissions, browser policy, or cross-origin isolation.
• The accessibility page does not test real assistive technology behavior. It reports browser-exposed DOM and CSS features related to accessibility.
• HSTS and other server-side policies cannot be fully verified from client-side JavaScript alone.