UUID Generator
Generate random v4 UUIDs / GUIDs instantly, locally in your browser.
Generate one or many random version-4 UUIDs (also called GUIDs) instantly, using the browser's cryptographically secure random number generator. Common for assigning unique identifiers to database records, API keys, or session tokens during development. Generate them one at a time or in bulk, and copy the list straight into your code or seed data - nothing is sent to a server.
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How it works
- 01
Choose how many UUIDs to generate.
- 02
Click Generate.
- 03
Copy one or all of the generated UUIDs.
Details
- Category
- Developer & data
- Runs
- In your browser
- Files uploaded
- No
- Cost per run
- Free
- Sign-in
- Not required
- Works offline
- Yes, once loaded
Last updated 2026-08-03
Common questions
What's the difference between UUID and GUID?
They're effectively the same concept - GUID is Microsoft's term for the same 128-bit identifier format as UUID.
How likely is a collision?
Version-4 UUIDs have 122 random bits, making accidental collisions astronomically unlikely even across billions of generated IDs.
Can I generate multiple UUIDs at once?
Yes - set a quantity and get a full list generated in one click.
Is generation done locally?
Yes - UUIDs are generated entirely in your browser.