Version 4 UUID Generator
A random 128-bit identifier — the safe default for database keys and request IDs.
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About Version 4
A version 4 UUID is generated almost entirely from random data: 122 random bits, with 6 bits fixed to mark the version and variant. This site uses a cryptographically secure random number generator, so collisions are astronomically unlikely. It's the right choice whenever you just need a unique value and don't care about ordering.
Generate a UUID in code
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Other UUID versions
Version 7 UUID Generator
A time-ordered UUID — a Unix-millisecond timestamp followed by random bits.
Version 1 UUID Generator
A time-based UUID built from a timestamp, clock sequence and node.
Nil UUID Generator
The all-zero UUID — a placeholder meaning “no value”.
GUID Generator
A GUID is the same 128-bit value, shown in the classic uppercase braces format.