UUID Generator
Generate random version 4 identifiers.
How to use UUID Generator
Enter how many UUIDs you need, from 1 to 100. Each identifier uses your browser’s cryptographically secure random generator.
Good to know
Version 4 UUIDs are suitable for identifiers. They are not a substitute for access controls or a complete authentication system.
Create identifiers for test records
Choose Generate to try this example.
Input
3
Expected result
Three UUID v4 values, one per line. Example shape: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx Here y is 8, 9, a, or b; x is a hexadecimal digit.
Common questions and mistakes
Why is the result different each time?
Version 4 UUIDs use random values. This tool calls the browser’s secure randomUUID function once for each requested identifier. Generate a batch, copy the output, and keep those values if you need stable fixture IDs.
Can I use a UUID as a password or login token?
A UUID is an identifier. Do not treat a resource as protected just because its ID is hard to guess. Authentication, authorization, token expiry, and revocation need their own design. For database uniqueness, keep an appropriate unique constraint.
Related tools
- Hash Generator — Calculate SHA-256, SHA-384, or SHA-512.
- JSON Formatter — Format, validate, and minify JSON.