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UUID v1 Generator

Developer

Generate current-time UUID v1 values with a random multicast node identifier.

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About UUIDv1

  • Contains timestamp and machine identifier (MAC address or random node)
  • Sortable by creation time - useful for time-ordered data
  • 128-bit identifier with 48 bits of node ID
  • May expose machine MAC address (privacy concern - consider UUIDv7 for privacy-friendly alternative)

Generate UUID v1 values using the current timestamp, a random multicast node identifier and cryptographic randomness. Your hardware MAC address is not read.

See more about the UUID v1 Generator

Choose a batch size, uppercase output or braces. UUID v1 strings do not sort globally by creation time because of their field layout.

Key features

  • Clean interface
  • Fast processing
  • No signup required
  • Works offline

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Quick answers for UUID v1 Generator

What timestamp is encoded?
The current time is represented as 100-nanosecond intervals since October 15, 1582, split across UUID v1 time fields. This field layout means the strings do not sort globally by creation time.
Does it use my hardware MAC address?
No. It uses a random multicast node identifier and cryptographic randomness rather than reading your hardware address.
Can I generate more than one at a time?
Yes, a number input lets you generate between 1 and 100 at once, with optional uppercase formatting and surrounding braces.