Launch Handler API Demo - Online Control App Launch Behavior
Configure how your PWA launches: focus existing or create new. Test with the launch_handler manifest field.
UD5 Toolkit
Online PWA Detection — Check what related apps your users already have installed
Click the button to detect installed related apps on this device using the getInstalledRelatedApps API. Use the switch to try a simulated demo.
| Platform | App ID | URL | Status |
|---|
related_applications field. It requires HTTPS and works mainly in Chromium browsers.
related_applications array to your manifest.json. Example:
{
"related_applications": [
{
"platform": "play",
"id": "com.example.app"
},
{
"platform": "webapp",
"url": "https://example.com/pwa"
}
]
}
Also link Android native apps via Digital Asset Links for the detection to work.
related_applications array. This is a privacy and security limitation to prevent fingerprinting.
Configure how your PWA launches: focus existing or create new. Test with the launch_handler manifest field.
Compress and decompress text using the browser's native Compression Streams API. See the binary output size.
Check if the browser has captured the beforeinstallprompt event. Understand why your PWA is (or isn't) installable.
Query the permission state of camera, microphone, geolocation, and more. See the response and learn the API.
Connect a game controller and see every button press, axis movement, and vibration test. Uses the Gamepad API.
Unified input demo: see pressure, tilt, and type from any pointer. Compare pointerType values. Essential for drawing apps.
Toggle a screen wake lock to prevent the device from dimming or sleeping. See the lock state and learn the API.
Test the experimental Translation API to translate text between languages directly in the browser, without cloud calls. Check support and copy the JavaScript starter.
Check if your page triggers the beforeinstallprompt event. Simulate the install flow. Debug PWA installability.
Decode an image progressively using the ImageDecoder API. See partial results and metadata. Modern alternative to <img>.
Decode individual video frames from a local file using the VideoDecoder API. Step through frames. Cutting‑edge browser feature.
Experiment with the Federated Credential Management API. Simulate a sign‑in flow without third‑party cookies. Privacy‑first.
Request HID devices and list them. Read input reports and send output. For custom hardware and controllers.
Request permission and detect when the user is idle (away from keyboard). See screen lock state. For native‑like apps.
Demonstrate how the Web OTP API automatically reads one‑time codes from SMS (mobile). Simulation with a fake SMS input.
Acquire and release locks across tabs. Prevent race conditions in IndexedDB or localStorage. Visual queue and lock state.
Register a periodic background sync to fetch fresh data even when the tab is closed. Understand the API and limits.
Connect a gamepad and see all button presses and axis movements visually. Check that every input is detected correctly.
Trigger different vibration patterns on mobile devices. Test if your phone supports haptic feedback. Simple demo.
Display your effective connection type (4g, 3g, etc.) and downlink speed using the Navigator API. Adapt your app accordingly.
See your device's battery level, charging status, and discharge time using the Battery Status API. Fun utility.
Check current screen orientation and test the lock API. Useful for mobile web apps. Demo with code.
Test the new HTML popover attribute for creating accessible tooltips, menus, and dialogs without JavaScript. Copy code snippets.
See the View Transitions API in action. Cross‑fade and morph between two states. Copy the JavaScript starter code.
Experiment with the Async Clipboard API: read/write text and images from the clipboard. Verify permissions and see demo code.
Test the Web Share API by sharing text, links, and files directly from the browser. Check compatibility and see example code.
Enter an API URL and quickly check its HTTP status code and response time. See response headers and body. Browser fetch.
Pick a method, URL, headers, and body, then send an HTTP request directly from your browser. Debug APIs easily.
Generate random JSON data with customizable fields (users, products, orders). Useful for frontend mocking. All local.
Execute GraphQL queries against any endpoint with variables and headers. Explore schema via introspection. All requests made directly from your browser.