Web Feature Check vs Clayshell

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

Clayshell is an SSH server manager for people who run their own servers. Add a server once, then do the daily work without leaving the app. TERMINAL A real terminal with full colour, in tabs. Your own shell, as many sessions as you need. FILES Browse the server over SFTP. Upload, download, rename, delete, make files and folders, and preview text files. EDITOR WITH A BACKUP Open a file on the server, edit it and save. Before every save the previous version is kept next to it as a .bak file, and one tap puts it back. If the file changed on the server while you were editing, Clayshell tells you instead of overwriting it. MONITOR CPU, memory, disk, load, uptime and the busiest processes, live, for Linux servers. PM2 See your PM2 processes, start, stop and restart them, and follow their logs. ALERTS Be told when a disk fills up, when CPU or memory stays high, when a PM2 process goes down, or when a server cannot be reached. On the Mac, Clayshell can watch your servers from the menu bar. A small script can also be installed on the server itself, so alerts reach Telegram, ntfy or a webhook even when your devices are asleep. MORE SSH Jump hosts. Import from your SSH config. Port forwarding. Ed25519, ECDSA and RSA keys, or a password. YOUR DATA STAYS WITH YOU • No account, no analytics, no tracking. Nothing is sent to us. • Passwords and keys are kept in the Keychain on your device. • Clayshell only talks to the servers you add. • It asks before trusting a new server, and stops if a server's key changes. • An optional lock with Face ID, Touch ID or your passcode. Clayshell has a day and a night look, and works on Mac and iPhone. Monitoring needs a Linux server. The PM2 screen needs PM2 on the server. Server alerts need curl and cron on the server. An RSA key protected by a passphrase is not supported yet.