What is UUID Generator?
UUIDs are 128-bit identifiers used everywhere from database primary keys to session tokens. ULIDs and NanoIDs offer sortable or shorter alternatives.
How to use
- Pick a format (UUID v4, v7, ULID, NanoID).
- Choose how many to generate.
- Click Generate and copy.
Frequently asked questions
What is the difference between UUID v4 and v7?
v4 is fully random. v7 has a time-ordered prefix, making it index-friendly while still being unique.
Are these IDs cryptographically random?
Yes. They use crypto.getRandomValues under the hood.
When should I use a NanoID?
When you need shorter, URL-safe IDs while keeping low collision risk.