UUID Generator
A fresh ID for the thing you’re building. Generate random version 4 UUIDs, one at a time or by the thousand.
One ID for a new record, or a batch for a fixture. Each UUID uses cryptographically strong browser randomness.
How these IDs are structured
xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx4 marks the version.
y is 8, 9, a, or b: the RFC variant.
No timestamp or device identifier is encoded. This generator creates version 4 UUIDs only.
Ready when you are
Choose a quantity, then generate a fresh set.
SPACE FOR SOMETHING NEW
Every idea needs
an identity.
Choose a count. Make a set.
Enter a whole quantity from 1 to 1,000, then generate. Copy and text downloads put one lowercase UUID on each line. Generate again replaces the set; changing the quantity or choosing Clear discards it. Nothing is copied automatically or saved in a history.
Version 4, by the standard.
RFC 9562 defines version 4 UUIDs with 122 random bits and fixed version and variant bits. That large random space makes accidental collisions extremely unlikely, but it is not a guarantee of uniqueness. Enforce unique constraints where your application needs them.
UUIDs identify things. Their format alone does not establish ownership, authorization, or authenticity. Use a current browser with Web Crypto; generation fails if cryptographic randomness is unavailable.