UUID Generator

Producing unique identifiers on demand: primary keys for database records, IDs for API resources or events, correlation IDs for tracing requests, unique file or folder names, or realistic test data — anything that needs a collision-free ID without a central counter.

A UUID (Universally Unique Identifier), also called a GUID, is a 128-bit value written as 32 hexadecimal characters in five hyphen-separated groups, e.g. 3f2504e0-4f89-41d3-9a0c-0305e82c3301. It is used as a practically-unique identifier without needing a central authority.

Version 4 — the fully random variant. All bits except the version and variant markers come from a cryptographically secure random source, so collisions are astronomically unlikely.

There is no absolute guarantee, but the odds of a collision are vanishingly small: you would need to generate billions of UUIDs before the probability of any duplicate became meaningful. For virtually all applications they can be treated as unique.

Some systems and databases expect UUIDs in uppercase, or stored without hyphens (a plain 32-character string). Toggle these to match the format your application needs, then copy the result.

No. UUIDs are generated locally in your browser and never uploaded, logged, or stored.

Yes. Set the quantity and the tool produces the whole batch instantly; use “Copy all” to grab the entire list.