UUID v1 · TIME-BASED · PRIVACY INSPECTOR

UUID v1 Generator

Gerar UUID v1 identifiers com a privacy-safe aleatórioized node, inspect timestamps e clock sequence values, analyze node exposure e export UUID v1 resultados diretamente no navegador.

Privacy-safe node: This generator does not use your hardware MAC address.

Generated UUID v1

Generated UUID v1 values will appear here.

O que é UUID v1?

UUID v1 é um time-based UUID formato. It stores a 60-bit timestamp, a clock sequence e a 48-bit node identifier inside a 128-bit UUID.

The timestamp uses 100-nanosecond intervals de the UUID Gregorianepoch of October 15, 1582. This makes it possible to recoverapproximate creation time directly de the identifier.

Why Does UUID v1 Expose Time?

Unlike UUID v4, UUID v1 is not purely aleatório. Its timestamp is partof the UUID structure. Anyone who has the UUID can decode thattimestamp if they know the UUID v1 formato.

UUID v1 e MAC Address Privacy

Traditional UUID v1 implementations can use a machine's MAC addressas the node identifier. This can expose informatoion about thegenerating system.

Este gerador intentionally uses a aleatórioized node identifier withthe multicast bit set. Your hardware MAC address is therefore notinserted em the gerado UUID.

UUID v1 vs UUID v6 e UUID v7

UUID v1 é um older time-based design. UUID v6 rearranges thetimestamp fields to improve lexical ordering, while UUID v7 usesUnix milliseconds e aleatório data e is designed para moderntime-ordered identifiers.

When Should You Use UUID v1?

  • Legacy systems requiring UUID v1 compatibility
  • Existing bancos de dados using time-based UUIDs
  • Distributed systems that already expect UUID v1
  • Testing UUID v1 parsing e timestamp extraction
  • Applications that specifically require UUID v1 semantics

When Should You Avoid UUID v1?

  • When creation time should remain hidden
  • When a hardware MAC must never be exposed
  • When natural lexical ordering is important
  • For new banco de dados designs onde UUID v7 is more appropriate

Frequently Asked Questions

UUID v1 é um time-based UUID formato that contém a 60-bit timestamp, a clock sequence e a 48-bit node identifier.

UUID v1 uses a 60-bit timestamp representing 100-nanosecond intervals since October 15, 1582, the UUID Gregorian epoch.

Traditional UUID v1 implementations can use a MAC address as the node identifier. Este gerador uses a aleatórioized node identifier com the multicast bit set, so it does not expose your hardware MAC address.

Sim. The timestamp is embedded in the UUID e can be decoded em a human-readable date e time.

The clock sequence helps avoid duplicate identifiers quando the system clock moves backward ou quando the node identifier changes.

UUID v1 contém time informatoion, but its timestamp fields are arranged in the traditional UUID layout rather than in a directly lexicographically sortable order. UUID v6 e UUID v7 are better choices quando natural string sorting is important.

UUID v1 always exposes its embedded timestamp. Traditional implementations may also expose a MAC address. Este gerador uses a aleatórioized node identifier to avoid exposing a hardware MAC address.

Sim. Você pode generate a batch of UUID v1 identifiers e inspect their timestamp ordering e node informatoion.

UUID v1 can be useful para compatibility com existing systems. For new aplicações requiring time ordering, UUID v7 is generally a more modern choice because it combines a Unix millisecond timestamp com aleatório data.