Version 1 UUID Generator
A time-based UUID built from a timestamp, clock sequence and node.
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About Version 1
A version 1 UUID combines a 60-bit timestamp (100-nanosecond intervals since 1582), a clock sequence, and a node identifier. Historically the node was the machine's MAC address; for privacy this generator uses a random node with the multicast bit set, as permitted by RFC 9562. Prefer version 7 for new systems that want time ordering.
Generate a UUID in code
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Other UUID versions
Version 4 UUID Generator
A random 128-bit identifier — the safe default for database keys and request IDs.
Version 7 UUID Generator
A time-ordered UUID — a Unix-millisecond timestamp followed by random bits.
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.