How to Test Universal Links: Complete iOS Deep Linking Guide 2024

1. Apple App Site Association (AASA) File Verification

The AASA file is the foundation of Universal Links. Here's how to verify it:

• Access your AASA file at: https://[your-domain]/.well-known/apple-app-site-association
• Confirm the response is valid JSON format
• Verify the Content-Type header is application/json
• Check that your app's Team ID and Bundle ID are correct

2. SSL Certificate Requirements

Apple requires HTTPS for Universal Links to function. Essential SSL checks include:

• Valid SSL certificate from a trusted Certificate Authority (CA)
• Current certificate (not expired)
• Proper implementation of TLS 1.2 or higher

3. iOS Application Configuration

Proper app configuration is crucial for Universal Links. Verify these settings:

• Associated Domains capability is enabled in Xcode
• Correct domain format: applinks:[your-domain] in entitlements
• Updated provisioning profile with Associated Domains capability
• Proper team and bundle ID configuration

4. Device Testing Protocol

Follow this systematic testing approach:

• Install the app via TestFlight or App Store (development builds may behave differently)
• Test Universal Links from various sources:
  • Safari browser
  • Messages app
  • Notes app
  • Email clients
• Verify both scenarios:
  • Cold start: App not running in background
  • Warm start: App already in memory

Troubleshooting Common Universal Links Issues

If your Universal Links aren't working as expected, try these solutions:

• Clear Safari cache and website data
• Remove and reinstall the application
• Check device logs using Console.app
• Verify domain associations in Settingsv [Your App]
• Test on different iOS versions

Automated Universal Links Validation