UUID / ULID

Generate unique identifiers in three popular formats: classic UUID v4, sortable ULID and compact NanoID — singly or in batches.

How to use

1. Pick the identifier type: UUID, ULID or NanoID
2. Set how many you need
3. Generate and copy

Frequently asked questions

What's the difference between UUID, ULID and NanoID?

UUID v4 is the universal standard; ULID sorts by creation time, which databases love; NanoID is shorter and URL-friendly.

Can two generated IDs collide?

The probability is astronomically small — that's the whole point of 122+ bits of randomness.

Are the IDs generated locally?

Yes, in your browser with cryptographic randomness; nothing is sent or stored.