UD5 Toolkit
Offline Capability Checker - Online Test PWA Readiness
Check if your site has a service worker registered and if it can load offline. Quick PWA readiness assessment.
Tag: PWA Manifest Generator
20+ toolsWindow Controls Overlay Demo - Online PWA Title Bar Customization
See how a PWA can extend content into the title bar area on desktop. Customize the window controls overlay.
Web Share Target Tester - Online Receive Shared Content
Simulate a PWA receiving shared text, links, and images. Test the Web Share Target API without a server.
Protocol Handler Registration - Online Register URL Scheme
Learn how to register your PWA to handle custom URL protocols. See the manifest entry and test.
Periodic Background Sync Tester - Online Register & Test
Register a periodic background sync and see the status. Schedule content updates for your PWA. API demo.
Get Installed Related Apps Demo - Online PWA Detection
Check if your related native or PWA app is installed. See the API in action and copy the code.
Content Indexing API Demo - Online Show in System Launcher
Add web content to the device’s content index (like Google Discover). See the indexed items and delete them.
Content Indexing API Test - Online Add to Device's Media Feed
Test the Content Indexing API to add a page to the device's content feed. See how your PWA integrates with the OS.
Web App Manifest Validator - Online Check PWA Manifest
Paste your manifest.json and instantly validate it against the W3C spec. Catch errors and warnings. Client‑side.
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.
Service Worker Debugger - Online View States & Update
See the current Service Worker registration, its state, and scope. Send 'skipWaiting' and update. PWA debug.
PWA Icon Resizer & Manifest - Online Generate Sizes
Upload a 512x512 logo and get resized icons for every PWA requirement. Download a zip and the corresponding manifest.json snippet.
Periodic Background Sync Registration - Online PWA Tool
Register a periodic background sync with a minimum interval. See the registration state and tags. Keep content fresh.
Cache Storage Viewer - Online Inspect Cache API
List cached responses for your domain. View headers, content, and delete individual entries. Understand your PWA's cache.
PWA Install Prompt Tester - Online Simulate Install
Check if your page triggers the beforeinstallprompt event. Simulate the install flow. Debug PWA installability.
Periodic Background Sync Demo - Online PWA Feature
Register a periodic background sync to fetch fresh data even when the tab is closed. Understand the API and limits.
Service Worker Lifecycle Viewer - Online Debug Tool
See the current state of a Service Worker for your page: installing, waiting, active. Unregister or skip waiting. Developer utility.
PWA Install Prompt Checker - Online See beforeinstallprompt Status
Check if the browser has captured the beforeinstallprompt event. Understand why your PWA is (or isn't) installable.
Cache Storage Viewer - Online Inspect PWA Cache
Explore the contents of the Cache Storage API for your domain. See cached requests and their sizes. Debug offline apps.
PWA Manifest Generator - Online Create app.webmanifest
Fill in your PWA details to generate a valid manifest.json file. Include icons, theme color, display mode.