🧭 Web & Browser
Browser-based diagnostics and web platform tools — PWA manifest generators and validators, service worker scaffolding, screen resolution and feature detection, user agent parsing, keyboard code lookups, WebSocket testers, and HTTP header analyzers. Understand the web platform from inside the browser.
🛡️ Service Worker Generator
Generate a service worker (sw.js) online — precache list, runtime cache strategies (cache-first, network-first, stale-while-revalidate), navigation fallback, registration snippet
Browser Feature Detector
Check which web APIs and features your browser supports — Service Workers, WebP, Clipboard, Crypto, WebGL, Container Queries, View Transitions, WebGPU and dozens more, with live support badges
PWA Manifest Generator
Build a Web App Manifest (manifest.json) for installable PWAs. Live JSON preview, validation, icons, shortcuts, screenshots, theme/background colors, display modes. Copy, download, share link.
Screen & Device Info
Live viewport size, screen resolution, device pixel ratio, color scheme, orientation, network type, CPU cores, touch support, and more — everything a frontend developer needs for responsive testing. Updates in real time as you resize the window.
User-Agent Parser
Decode any User-Agent string into browser, engine, OS, device type, CPU architecture, and bot detection. Compare two UAs side-by-side, copy individual fields, deep-link via #ua=.
Web App Manifest Validator
Validate a web app manifest.json — required fields, icons, start_url, scope, display mode, screenshots, and shortcuts.