UUID Generator
Generate one or many UUID v4 values — copy or download.
About this tool
Create RFC 4122 version 4 UUIDs for database keys, correlation IDs, and test fixtures. Generate up to 100 at once with optional uppercase hex.
What you get
- Batch size from 1 to 100 UUIDs
- Lowercase or uppercase output
- Copy all or download as .txt
How to use
Set how many UUIDs you need, choose casing, click Generate, then copy or download the list.
FAQ
How to generate a UUID v4 online?
Set batch size, click Generate, and copy RFC 4122 version 4 UUIDs in lowercase or uppercase hex.
What is the difference between UUID and GUID?
They refer to the same 128-bit identifier format—GUID is Microsoft's name; UUID is the RFC standard term.
How to generate multiple UUIDs at once?
Choose a count from 1 to 100, generate, then copy all or download as a .txt file.
Are browser-generated UUIDs cryptographically random?
Version 4 UUIDs use random bits from the Web Crypto API—suitable for keys, correlation IDs, and test fixtures.
By using this tool you agree to our Terms of Use and Privacy Policy. Results are provided as-is without warranty.