UUID generator
RFC 4122 v1, v4, and v7 identifiers. Batch generation, uppercase toggle, and .txt export. Runs in your browser.
1
FAQ
What is a UUID?
A 128-bit identifier defined by RFC 4122. Designed to be globally unique without coordination — collision probability is astronomically low.
Which version should I use?
v4 for general randomness. v7 for database primary keys (lexicographically sorts by time). v1 only for legacy compatibility.
Are these cryptographically secure?
v4 and v7 use crypto.getRandomValues() for the random portion — the same CSPRNG your OS uses for keys.