PWA & Installability Inspector

About

PWA & Installability Inspector tells you — instantly — whether any website
meets Chrome's Progressive Web App install criteria, and exactly what to fix if
it doesn't.

Click the icon on any site to get a clear verdict plus a full report:

• Installability verdict — will Chrome's beforeinstallprompt fire? Every
  requirement checked off, with the reason for anything missing.
• Manifest audit — per-field validation (name, start_url, display, scope,
  theme/background color, icons, id…) with concrete recommendations.
• Icons — checks for 192px & 512px, maskable coverage, verifies icons actually
  load (no 404s) and that declared sizes match the real image.
• Service worker — registration, scope, state, and whether it controls the page.
• Offline readiness — checks service-worker control and whether start_url is in
  the cache.
• Advanced Capabilities (Fugu) — shows which capability APIs the browser
  supports AND which the site actually uses.

Fix it fast with built-in generators:

• Export the current manifest, or generate a corrected one.
• Build a full PWA icon set (including a maskable variant) from a single image.
• Copy ready-to-paste snippets (manifest link, meta tags, a minimal offline
  service worker).

Privacy first: everything runs locally in your browser. No analytics, no
telemetry, no servers, no account. Nothing about you or the sites you inspect
is ever collected or transmitted.

Open source (MIT): https://github.com/JohnJunior/pwa-installability-inspector