Find your iPhone UDID

Get the UDID of your iPhone or iPad in under a minute, on the device itself. Free, no account, and nothing is kept.

On your iPhone or iPad
Open this page in Safari on the device whose UDID you need.
Get my UDID
  1. Open this page in Safari on the iPhone or iPad and tap Get my UDID.
  2. Tap Allow in the pop-up, then Close.
  3. Open Settings, tap Profile Downloaded, then Install.
  4. Safari opens with your UDID. Tap Copy UDID and send it to your developer.

On a computer? Open buildferry.app/udid in Safari on the iPhone instead. The profile only asks for the UDID, model and iOS version, and removes itself. Away from home, iOS may hold it for an hour (Security Delay).

What is a UDID?

A UDID (unique device identifier) is the ID Apple uses to register an iPhone or iPad for testing. Developers need it before a build that isn't on the App Store or TestFlight will install on your device. iPhones from the XS onward have a 25-character UDID with one hyphen, like 00008110-001A2B3C4D5E6F7A.

The Settings app doesn't show it, and App Store apps can't read it. That's why this page uses a profile in Safari. You can also find it with a cable, in Finder, Xcode or iTunes: see every way to find a UDID.

For developers: skip the UDID step

Collecting UDIDs, adding them in Apple Developer and rebuilding is the slowest part of ad hoc testing. With BuildFerry, testers open one link, their iPhone is registered with your Apple account once you approve it, and the build is re-signed in the cloud. Nobody copies a UDID.

Send your first build

Questions

Is this UDID finder free?

Yes. There is no account, no app to install and no limit. It is made by BuildFerry, which shares iOS test builds with testers.

Does BuildFerry keep my UDID?

No. The UDID, model and iOS version are encrypted into the result page's own address, and nothing is saved on our side. That page stops working after 7 days.

Does the profile stay on my iPhone?

No. It is a one-time "Profile Service" profile: iOS sends the device details and removes it straight away. It only asks for the UDID, model and iOS version.

Why does iOS say the profile is Verified?

It is signed with BuildFerry's certificate, so iOS can show who it is from. A profile that only asks for device details can't install anything or read your data.

Why do developers need my UDID?

Apps that aren't on the App Store or TestFlight only install on iPhones registered with the developer's Apple account. The UDID is how the iPhone is registered.

Why does it say "Security Delay in Progress" or "could not install a profile"?

That's Apple's Stolen Device Protection. Away from a familiar place like home or work, iOS makes you wait an hour before installing any profile. When it notifies you, open Settings, tap Profile Downloaded and install it, or try again from home.

It downloaded but nothing happened. What now?

Open Settings: iOS shows Profile Downloaded near the top. If it is gone, it expired after 8 minutes, so tap Get my UDID again. It has to be Safari: other browsers on iOS can't install profiles.