Free Tools / UUID Generator

UUID Generator

Generate cryptographically random v4 UUIDs. Fast, private and free — everything runs in your browser.

How many (1–100)

Uses crypto.randomUUID() — cryptographically random v4 UUIDs generated entirely in your browser.

Generate UUIDs online

A UUID (Universally Unique Identifier) is a 128-bit identifier standardized by RFC 4122. Version 4 UUIDs use random data, making collisions astronomically unlikely without any central authority.

Common uses

Primary keys in distributed databases
Session and request IDs in microservices
Correlation IDs for distributed tracing

Frequently asked questions

What version of UUID does this generate?

Version 4 (random). It uses crypto.randomUUID() which produces 122 bits of cryptographically secure randomness.

Can I generate multiple UUIDs at once?

Yes, up to 100 at a time. Each one is independently random.