UUID generator
Generate one or many random v4 UUIDs with a click, using the browser crypto API. Copy individually or all at once.
About this UUID generator
Generate one or many random version-4 UUIDs with a click, using the
browser’s cryptographically-secure crypto.randomUUID(). Copy them one at a
time or all at once.
Where UUIDs are used
UUIDs (also called GUIDs) give you unique identifiers without a central counter — perfect for database primary keys, request/trace ids, idempotency keys, file names and offline-first records that need ids before they reach a server.
FAQ
Are these UUIDs cryptographically random?
Yes — they use the browser's Web Crypto secure random source via crypto.randomUUID(), the same quality recommended for security tokens.
What is a version 4 UUID?
A 128-bit identifier with 122 random bits. The odds of two colliding are astronomically small, so you can generate them independently without coordination.