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ID · Generator
UUID Generator
Generate secure, unique identifiers (v1, v4, v5, ULID, NanoID) with custom formatting.
GENERATING...
tune Configuration
Custom Prefix
layers Bulk Generator
verified_user Validator
FAQ
What is a UUID?
A Universally Unique Identifier (UUID) is a 128-bit number used to identify information in computer systems.
Is generation secure?
Yes, we use the Web Crypto API for cryptographically strong random values. All generation happens locally in your browser.
Can two UUIDs be the same?
Mathematically possible, but astronomically unlikely. For v4, you'd need to generate 1 billion UUIDs every second for 85 years for a 50% chance of a single collision.
What is the difference between v4 and v5?
v4 is completely random. v5 is deterministic, producing the same UUID for a given 'Namespace' and 'Name' combination.