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How to Open Universal Link Diagnostics on iOS 27

Open Universal Link Diagnostics in iPhone Developer settings and find the URL field for investigating associated domain issues.

Step 1

Open Settings from the Home Screen

iPhone Home Screen with the Settings app in the third row
Tap the gray Settings icon on your Home Screen.

Before you begin: An unlocked iPhone running iOS 27, paired with Xcode, with Developer Mode enabled and Developer visible in Settings.

Find and tap the Settings app on your Home Screen. Its icon looks like a gray gear.

Step 2

Open Developer in Settings

Settings showing the Developer menu
Tap Developer in Settings.

In Settings, scroll down and tap Developer.

Step 3

Open Diagnostics

Developer settings showing Diagnostics
Tap Diagnostics.

Scroll to Diagnostics.

Step 4

Find the Universal Link URL field

Diagnostics settings showing URL
Find the Universal Link URL field.

The Diagnostics screen provides a URL field for checking Universal Link compatibility. Enter the complete URL you want to investigate.

Reference

By ProgramGuru

Published: 2026-10-14

Updated: 2026-10-14

Instructions reviewed against Apple documentation on 2026-10-14.

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