Developer Tools · 100% Free
UUID Generator (v4)
Need unique identifiers for your database, API or code? Generate random UUID v4s — one or twenty-five at a time — free.
How to Use the UUID Generator
1
Choose how many UUIDs you need (1, 5, 10 or 25).
2
Click Generate UUIDs.
3
Copy them all with one click, or select individually.
Why Use Our UUID Generator?
- True v4 format. Proper 8-4-4-4-12 layout with version and variant bits set.
- Batch generation. Create up to 25 UUIDs in one click.
- One-click copy. Grab the whole batch for your code or database.
- Private. Generated locally with your browser’s randomness.
UUID Generator FAQs
A Universally Unique Identifier — a 128-bit label like 550e8400-e29b-41d4-a716-446655440000 used to identify records without central coordination.
Version 4 UUIDs are randomly generated (122 random bits), making collisions practically impossible.
The odds are astronomically low — about 1 in 2^122. For all practical purposes, every v4 UUID is unique.
Database primary keys, API request IDs, session tokens, distributed systems — anywhere unique IDs are needed.
They use your browser’s randomness — fine for IDs, but use a crypto library for security tokens.
No. Generation happens entirely in your browser.
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