Static Browser Diagnostics
Browser Capabilities Tester
Browse focused test pages for media, APIs, graphics, performance, security context, and interaction data. Each section is designed for quick scanning on desktop and mobile.
Media Formats and Playback
Inspect support for common image formats, video codecs, and audio playback.
Check Media
Forms & Input
Test form elements and input types support
Check Forms
Security Features
Check browser security APIs and the current page security context
Check Security
Web APIs
Check storage, device, communication, and performance-related APIs
Check APIs
User Data
View all available browser, system, and user information
View Data
Graphics and Rendering
Inspect WebGL, Canvas, CSS, and SVG rendering capabilities.
Check Graphics
Accessibility
Inspect browser APIs related to semantics, keyboard access, and user preferences
Check Accessibility
Activity Tracking
Monitor user interactions and browser events
View Activity
JWT Tools
Encode, decode, and compare JWTs with browser-side HS256 signing
Open JWT Tools