UUID Generator
Generate unique identifiers instantly
Generate UUIDs
FAQ
What is a UUID?
A Universally Unique Identifier, a 128-bit value with effectively zero chance of collision worldwide. Used for database keys, filenames, and session IDs.
What is UUID v4?
The most common version, generated from random numbers. This tool uses your browser's cryptographic randomness for secure v4 UUIDs.
Are collisions really impossible?
v4 UUIDs have about 5.3x10^36 possibilities, so collisions are negligible even across billions of IDs.
What are the format options?
Lowercase (standard), uppercase, no dashes, or wrapped in braces, ready to paste wherever you need.
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