UUID Generator
Generate version-4 UUID/GUID identifiers instantly, one at a time or in bulk.
Options
5
Format
Choose your options and generate a UUID.
UUIDs are generated in your browser and are never uploaded.
How It Works
- 1Choose how many UUIDs you need
- 2Pick your format — hyphens, case and braces
- 3UUIDs are generated automatically
- 4Copy one or all of them
Common Uses
- Database primary keys
- API request or trace IDs
- Session and token identifiers
- Test and seed data
- File and object names
- Distributed system record IDs
Frequently asked questions
A UUID (Universally Unique Identifier) is a 128-bit value used to identify records, database rows, sessions, or objects without needing a central authority to hand out IDs. Two independently generated UUIDs are, for practical purposes, guaranteed not to collide.
Version 4 — fully random UUIDs generated with the Web Crypto API. This is the most commonly used version for general-purpose unique identifiers in databases, APIs and application code.
Yes. Each one is generated independently using a cryptographically secure random number generator, so a batch of 50 is just as unique and unpredictable as generating one at a time.
Yes. Turn off "Include hyphens" for a compact 32-character format, or turn on "Uppercase letters" if your system expects UUIDs in uppercase hex.
No. They're generated entirely in your browser using `crypto.randomUUID()`. Nothing is uploaded to Genovo or any third party.
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