UUID Generator Online — Random v4 UUIDs Free
Generate version-4 UUIDs — random unique identifiers like 550e8400-e29b-41d4-a716-446655440000 — one or fifty at once, using your browser's crypto randomness.
UUID Generator
Generate version-4 UUIDs (random) for IDs, keys and test data — one or many at once.
How to use it
- Choose how many UUIDs you need.
- Tap “Generate UUIDs”.
- Copy them all into your code, database or test data.
Frequently asked questions
What is a UUID?
A 128-bit universally unique identifier, written as 32 hex digits in five groups — used as IDs for records, files and sessions.
Are these UUIDs really random?
Yes — they are version-4 UUIDs built from your browser's crypto.getRandomValues, the same source password generators use.
Can two UUIDs ever collide?
Practically never — there are about 5×10³⁶ possible version-4 UUIDs, so a collision is effectively impossible.
What are UUIDs used for?
Database primary keys, API request IDs, file names, session tokens and test data.
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This tool never downloads other people's Facebook, TikTok or Instagram videos. It works only on files and text you provide. See our official download-your-own-video guide.