UUID v1 Generator
Generate time-based UUID v1 values from a timestamp for sortable unique identifiers.
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)
A version 1 UUID isn't purely random the way a version 4 UUID is, it encodes an actual timestamp along with a node identifier traditionally derived from the generating machine's MAC address, which makes it naturally sortable by creation time but also means it can leak a real piece of hardware identification embedded right in the identifier, a known privacy consideration that pushed systems toward alternatives that don't encode anything hardware-specific. This tool generates version 1 UUIDs from a given timestamp, time-ordered and correctly structured, for systems that specifically require or already rely on that format.
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Useful for generating a UUID that needs to sort by creation time for a legacy system already built around version 1, understanding what information is actually embedded inside a version 1 UUID before using it somewhere sensitive, or producing a time-based identifier for a system that predates newer sortable alternatives.
Key features
- Clean interface
- Fast processing
- No signup required
- Works offline