UUID Generator
Generate RFC 4122 version 4 UUIDs instantly in bulk.
UUID v4 Generator
5
Standard
Uppercase
No hyphens
Braces
How to Use
- Set the quantity (1 to 100 UUIDs).
- Choose a format: standard, uppercase, no hyphens, or wrapped in braces.
- Click Generate.
- Click Copy All or select individual UUIDs from the list.
Frequently Asked Questions
QWhat is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify information in computer systems. Example: 550e8400-e29b-41d4-a716-446655440000.
QWhat is UUID v4?
UUID v4 is randomly generated. It's the most commonly used version because it requires no coordination between systems.
QHow unique is a UUID?
The probability of generating a duplicate UUID v4 is astronomically low — roughly 1 in 5.3 × 10³⁶.
QAre these UUIDs safe for database primary keys?
Yes. UUID v4 is widely used as primary keys in distributed databases where auto-increment IDs aren't practical.
About This Tool
UUIDs are generated using the browser's crypto.randomUUID() API (or a crypto.getRandomValues fallback), producing RFC 4122-compliant v4 identifiers.