RandomKeyGenerator.com

Home / UUID Generator / Java

UUID Generator for Java

Generate a UUID right here, or copy the exact Java code to generate one in your own project using java.util.UUID, part of core Java since Java 5, no dependency needed.

100% client-side No account, no sign-up java.util.UUID, core Java since Java 5

UUID Generator for Java

Click Generate to create one.

Generate a UUID in Java

java.util.UUID has been part of core Java since Java 5, no external dependency needed.

import java.util.UUID;

public class Example {
    public static void main(String[] args) {
        UUID id = UUID.randomUUID();
        System.out.println(id);
        // e.g. 550e8400-e29b-41d4-a716-446655440000
    }
}

To parse a UUID string back into a UUID object, use UUID.fromString("...").

How this tool works

UUID.randomUUID() in Java uses a cryptographically strong pseudo-random number generator internally to produce a version-4 UUID per RFC 4122, the same standard this page’s own generator follows, which uses the Web Crypto API’s crypto.randomUUID() in your browser.

Sources:

Frequently asked questions

Do I need a Maven or Gradle dependency for UUIDs in Java?

No. java.util.UUID is part of the Java standard library (core Java since Java 5). No external dependency required.

How do I compare two UUIDs in Java?

Use .equals(), not ==. UUID overrides equals() to compare by value, the same way you’d compare any object in Java.