UUID Generator
Generate random UUIDs (v4) instantly. Bulk generate, copy in various formats, and use in your projects.
6421a569-4485-4ef4-a5ac-82e183410fffWhat is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier that is guaranteed to be unique across all space and time. UUIDs are commonly used as:
- Database primary keys
- Session identifiers
- Transaction IDs
- API keys and tokens
- File names for uploads
- Tracking IDs
This generator creates UUID v4, which uses random numbers. The format is:xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
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What is UUID v4?
UUID v4 is the most common type of UUID. It uses random or pseudo-random numbers to generate the identifier. The "4" in position 13 indicates the version.
Are these UUIDs unique?
Yes, for all practical purposes. The probability of generating duplicate UUIDs is astronomically low - you'd need to generate billions of UUIDs per second for years to have a 50% chance of a collision.
What's the difference between UUID and GUID?
They're the same thing. GUID (Globally Unique Identifier) is Microsoft's term for what is standardized as UUID. Both follow the same format and generation methods.
Is this secure for tokens/passwords?
UUIDs are unique but not cryptographically secure for sensitive tokens. Use proper cryptographic random generators for authentication tokens, API keys, or passwords.