Web Feature Check vs DevPocket

Discover What the Browser Really SupportsDiscover What the Browser Really Supports Web Feature Check helps developers, testers, and tech-savvy users instantly check which web technologies are supported in the current environment - whether it’s a mobile browser, embedded WebView, or custom in-app browser. Whether you're debugging quirks in mobile Safari or ensuring your web app works in limited environments, this tool gives you instant clarity. Key Features Check Runtime Web Features Detect supported JavaScript APIs, HTML5 elements, CSS features, media codecs, and more - all from the environment itself. Test Browser & WebView Capabilities Identify the exact feature set exposed by any browser, including embedded views and in-app browsers. Designed for Mobile Testing Quickly test on real devices - no desktop emulators, no guesswork. Test Categories and Coverage 1. HTML5 & Media Tests core media-related capabilities: - canvas, video, audio, picture, srcset - WebGL / WebGL2 - Picture-in-Picture 2. Audio & Media Processing Covers modern media and audio APIs: - Web Audio, MediaRecorder, ImageCapture - Web Speech API, Media Capabilities, Web MIDI 3. UX & Notifications Checks interaction and user feedback features: - Notifications, Fullscreen, Page Visibility - Web Share, Badging, Wake Lock, Vibration 4. JavaScript APIs Includes advanced JS platform features: - Service Workers, WebAssembly, Fetch, Streams - Clipboard, Crypto, ES6 Modules, Encoding API 5. Performance & Monitoring Observability & reactivity tools: - Intersection / Resize / Mutation / Performance Observers - Reporting API 6. Navigation & Communication Tests communication between contexts: - History & URL APIs - Beacon, BroadcastChannel, Server-sent Events - WebSockets, MessageChannel, XMLHttpRequest 7. Storage & Files Detects client-side data persistence options: - localStorage, sessionStorage, IndexedDB - File System Access, Cache Storage, File API - StorageManager & usage estimates 8. Input & Interaction Covers input modalities and interactivity: - Touch, Pointer, Drag-and-Drop - Gamepad, Pointer Lock, Viewport API - Selection API 9. Connectivity & Device Access Tests direct hardware or network integration: - WebRTC, Web Bluetooth, USB, Serial - Geolocation, DeviceMotion, Orientation, Battery, Network Info 10. Animation & Graphics Graphics rendering and animation pipelines: - Web Animations, WebGPU, WebCodecs 11. CSS & Layout Modern layout and visual CSS features: - CSS Grid, Flexbox, Container Queries, Subgrid - Backdrop-filter, View Transitions, Font Loading, Typed OM 12. Commerce & Payment E-commerce and data collection: - Payment Request API, Contact Picker 13. Security & Permissions Access and auth-related technologies: - Permissions, WebAuthn, Credential Mgmt, Trusted Types 14. Experimental APIs Emerging technologies still in draft or behind flags: - WebXR, Web NFC, Web Locks, WebTransport - Background Sync, Push API, Idle Detection, Compression Streams Scoring & Reporting - The app gives you a feature support score (e.g. 82/120) - Each category shows how many tests passed - Color-coded badges help you quickly interpret support levels (fully supported vs. unsupported) - Optionally, users can explore each feature’s MDN documentation directly from the interface

DevPocket is a compact yet powerful developer toolkit designed to streamline your everyday coding workflow. Whether you’re working with JSON, APIs, regex, or color formats, DevPocket has you covered—no need to switch between dozens of tools or browser tabs. Feature Highlights: 1. JSON Formatter – Beautify and structure raw JSON for better readability. 2. JSON To Model Converter – Instantly convert JSON into data models for Dart, Swift, Kotlin, or React. 3. Regex Tester – Test and validate regular expressions with live preview and saved patterns. 4. Simple API Request Tester – Send and inspect HTTP requests, with cURL import/export support. 5. JWT Generator & Decoder – Create, sign, and decode JWT tokens (HS256, RS256, ES256, PS256). 6. Enum Generator – Generate enums from string values automatically. 7. UUID Generator – Generate version 4 UUIDs instantly. 8. String Diff Tool – Compare two strings or JSON blocks and highlight differences. 9. Base64 String Converter – Encode or decode text with Base64 format. 10. Base64 Image Converter – Convert or preview images in Base64. 11. Color Converter – Convert between HEX, RGB, HSL, and OKLCH formats. 12. Git Command Helper – Build Git commands interactively. 13. Timestamp Converter – Convert Unix timestamps and calculate time differences. 14. Local Share – Share content between parts of the app or across devices. And many more useful tools waiting for you to discover Why DevPocket: • Clean, modern UI • Works fully offline • Optimized for macOS, iOS, and Web • Built specifically for developers