Easy Steps to Find Unique Device Identifier (UDID) on iPhone

If you're an iPhone user or a developer working with iOS applications, you may have come across the term "UDID" (Unique Device Identifier). This 40-character string is used to uniquely identify your iPhone, and it can be important for app testing, development, or even troubleshooting. If you're wondering how to find UDID on iPhone, you’re not alone—many iPhone users need this information for a variety of tasks. Whether you're a developer testing apps or you need the UDID for activating beta features or services, this blog will guide you through the steps to find it.

What is a UDID?

The UDID is essentially a unique code assigned to every Apple device, including iPhones, iPads, and iPods. This identifier is used by Apple and developers to uniquely identify a device. In the past, the UDID was used for a variety of purposes, including registering devices for beta testing or app deployment, but due to privacy concerns, Apple has restricted its use in some areas. That said, it’s still an essential piece of information for developers and certain advanced users.

Why Do You Need to Find Your iPhone’s UDID?

There are a variety of scenarios where you might need to find your iPhone's UDID. Some of the common reasons include:

Beta Testing: If you're participating in an iOS app beta program, developers may require your UDID to allow you to install their app.

Device Management: UDID is often used by mobile device management (MDM) tools to register and manage devices in enterprise environments.

App Development: Developers may use UDID to register devices for development and testing of apps that aren't available on the App Store.

No matter your reason, knowing how to find UDID on iPhone is a helpful skill, and the process is simple when you know where to look.

Step-by-Step Guide to Finding Your UDID

There are multiple ways to locate your iPhone’s UDID, and while some are more direct than others, they are all easy to follow. Below are the best methods for finding the UDID on your iPhone.

Method 1: Using iTunes (or Finder on macOS Catalina and later)

If you have a Mac or a Windows computer, you can find your UDID through iTunes (or Finder if you're using macOS Catalina or later). Here’s how:

Connect Your iPhone to Your Computer

Use a USB cable to connect your iPhone to your computer.

Open iTunes or Finder

If you're on a Mac running macOS Mojave or earlier, open iTunes.

If you're on macOS Catalina or later, open Finder.

Locate Your iPhone

In iTunes, click on the small iPhone icon near the top left. In Finder, your iPhone should appear in the sidebar under "Locations."

Access Device Information

Click on the “Summary” tab in iTunes or Finder to view details about your iPhone.

Find the UDID

In iTunes: Click on the “Serial Number” field, and it will change to show your UDID.

In Finder: You may need to click on the "Identifier" option under your device information to reveal your UDID.

Copy the UDID

Once the UDID is displayed, you can copy it by right-clicking and selecting "Copy."

Method 2: Using Xcode (For Developers)

If you're an iOS developer or have Xcode installed on your Mac, you can find your UDID through this Apple development tool. Here’s how:

Install and Open Xcode

If you don’t have Xcode, you can download it from the Mac App Store. Once installed, launch the app.

Connect Your iPhone

Connect your iPhone to your Mac using a USB cable.

Open Devices and Simulators Window

In Xcode, click on "Window" in the top menu, then choose "Devices and Simulators."

Select Your iPhone

Your connected iPhone should appear in the Devices list. Click on it.

Locate the UDID

In the Device Information section, you’ll see the UDID listed as "Identifier." You can copy it by right-clicking and selecting "Copy."

Method 3: Using Third-Party Tools (For Quick Access)

If you’re looking for a quick and easy method, third-party tools and online services allow you to find your iPhone’s UDID without needing a computer. Websites like UDID.io can help you quickly retrieve your UDID with just a few steps: