Free dev tool
Universal Link Validator
Make sure your links open your app. Paste a domain to check iOS Universal Links and Android App Links, then get a clean pass/fail summary with fix steps you can hand to engineering.
Run a validation
Paste a domain or URL and validate your app-opening setup.
What this tool checks
Checks the files your apps rely on to open links:
- iOS Universal Links (AASA)
- Android App Links (Digital Asset Links)
- Redirects and response headers that can break app opening
FAQ
What is a Universal Link validator?
A Universal Link validator checks whether your iOS Universal Links and Android App Links are configured correctly so links open your app instead of the browser.
Why do Universal Links open Safari instead of my app?
Common causes include missing or invalid AASA / assetlinks.json files, redirects, wrong content-type headers, or mismatched app identifiers.
Do I need to sign up?
No. This validator is free and works without signup.
Do you index the results page for a specific domain?
No. Domain-specific results are not indexed to avoid duplicate or low-quality pages.
Need to generate universal links and deep links, not just validate them? See Appy’s deep linking features.