Web Feature Check vs Great Web View Tester

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

Great Web View Tester is a developer tool for testing web views, authentication flows, and URL redirections on iOS. 4 Testing Modes: - ASWebAuthenticationSession — Test OAuth and login flows using Apple's secure authentication session. Configure callback URL scheme and ephemeral session mode. Capture callback URLs and authorization codes automatically. - WKWebView — Open any URL in a fully configurable WKWebView. Toggle JavaScript, address bar, navigation bar, page title, back/forward gestures, link preview, inline media playback, non-persistent data store, and cookie clearing. Set a listen URL to automatically capture redirections. - SFSafariViewController — Launch URLs in Safari's in-app browser with reader mode, bar collapsing, and customizable dismiss button style. Track full navigation history with redirect detection. - External Browser — Open URLs in the device's default browser and capture the return via universal link. Result Capture & Navigation History: All callback URLs, redirections, and errors are displayed with parsed query parameters and timestamps. Text is selectable for easy copying. Navigation history shows each request, redirect, and final load with millisecond-precision timestamps. Try all features with 10 free launches. Unlock unlimited usage with a subscription or one-time purchase. Pro Options To Unlock Unlimited Usage: Pro Monthly: Unlock unlimited usage for 1 month, $1.99/month, auto-renews monthly Pro Lifetime: Unlock unlimited usage for lifetime, $9.99 one-time purchase The monthly subscription automatically renews unless cancelled at least 24 hours before the end of the current period. Payment is charged to your Apple ID account at confirmation of purchase. Manage your subscription in Settings > Apple ID > Subscriptions. Terms of Use: https://support.buddy.cn/terms-of-use Privacy Policy: https://support.buddy.cn/privacy-policy