DevFmt/

UUID Generator

Count:
Click Generate or choose a count to create UUIDs
Output — UUIDs

How to use UUID Generator

UUID Generator creates random version 4 UUIDs (universally unique identifiers) using your browser's cryptographically secure crypto.randomUUID() API. A v4 UUID is a 128-bit identifier — formatted as 32 hexadecimal digits in five hyphen-separated groups — that's random enough to be treated as globally unique without any central coordination.

Generate a single UUID or a batch of up to 50 at once, then copy them with one click. Each refresh produces brand-new identifiers.

Key features: cryptographically random v4 UUIDs, single or bulk generation (up to 50), one-click copy, and standard 8-4-4-4-12 formatting.

UUIDs are used as primary keys in databases, unique identifiers for API resources, correlation IDs for distributed tracing, idempotency keys, and file or session names where collisions must be avoided. Because they're generated with a secure random source, the chance of two UUIDs colliding is negligible. Generation happens entirely in your browser, so no identifiers are ever logged or stored on a server.

FAQ

What is a v4 UUID?
A version 4 UUID is a 128-bit identifier whose bits are almost entirely random. It's written as 32 hexadecimal digits in the pattern 8-4-4-4-12, for example 'f47ac10b-58cc-4372-a567-0e02b2c3d479'.
How do I generate multiple UUIDs?
Set the count and generate up to 50 UUIDs at once. Each one is independently random, and you can copy the whole batch with a single click.
Are these UUIDs truly unique?
They're generated from a cryptographically secure random source, so the probability of a collision is so small it can be treated as effectively zero for practical purposes.
Are the UUIDs generated privately?
Yes. They're created locally in your browser with crypto.randomUUID(). No identifiers are sent to or stored on any server.

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