Free instant check · no signup
When your Apple App Site Association or Androidassetlinks.json is misconfigured, universal links and App Links fail with no error and no log — users just get bounced to the browser. Check yours in seconds.
Validates the Apple App Site Association and Androidassetlinks.json files for a domain. Monitor domains continuously →
Provide what you expect to be live. If any is missing from the served files, that's drift — a signing-key rotation or app-ID change that makes deep links silently fail.
None of these throw an error. The file is "there", the deploy is "green", and links just stop opening your app.
A deploy, redirect rule, or CDN path change makes/.well-known/ 404. Every universal link instantly falls back to the browser.
A 301/302 to a perfectly good 200 page still disables the link — Apple and Android ignore any association file that redirects.
A trailing comma, the wrong shape, or a non-JSON content-type and the whole file is silently discarded.
Play App Signing rotates your SHA-256 cert; the old fingerprint inassetlinks.json no longer matches and Android App Links break — with the file still returning 200.
A generic uptime pinger only tells you the file responded. Butmost deep-link failures return 200 — so a pinger reports all-green while your links are dead.
Run a check from the box above, or from your terminal:
npx deeplinkping check yourdomain.com
Web and CLI, unlimited, no account.
Add your domains and we re-check them every day, comparing against your expected fingerprints and app IDs. The moment something breaks or drifts, you get a Slack or email alert — before your users do.
Per workspace, not per seat.
$0
Instant checker + CLI
npx CLI$19/mo
Up to 5 domains
$49/mo
Up to 25 domains
Get early access to daily automated monitoring with Slack & email drift alerts. We'll email you the moment it launches — and if you ran a check above, we'll bring that domain along.
✓ You're on the list — we'll email you the moment monitoring launches.