A UUID (Universally Unique Identifier) is a 128-bit label like 550e8400-e29b-41d4-a716-446655440000 that identifies something, a database row, an API resource, a session, with near-zero chance of ever colliding with another. Developers use them as primary keys, public-facing IDs, and tokens precisely because they can be generated anywhere without coordination.
Our free UUID Generator creates version 4 (random) UUIDs in bulk, up to 100 at a time, with one-click copy and an optional uppercase format.
Learn the versions and trade-offs in what a UUID is and when to use one.
