Free UUID Generator
Generate unique identifiers in UUID v4, GUID, NanoID, and more formats with our free tool. Bulk generation supported.
- UUID v4 generation
- GUID format
- NanoID generation
- Bulk generation
- Custom length options
- One-click copy
Frequently Asked Questions
What's the difference between UUID and GUID?
They're essentially the same - 128-bit identifiers. UUID is the standard term, GUID (Globally Unique Identifier) is Microsoft's name. The formats are identical.
Are these UUIDs truly unique?
UUID v4 uses cryptographic random numbers. The chance of collision is astronomically small - practically impossible. They're safe for production use.
When should I use NanoID?
NanoID is shorter (21 chars vs 36) while remaining unique. Use it when URL-friendliness and length matter. UUID is more universal for backend systems.