UUID v7 stores a Unix millisecond timestamp in the leading bytes, which makes new IDs sort roughly by creation time while preserving random bits for uniqueness. It is useful for database keys, logs, events, queues, and systems where UUID v4 randomness causes poor index locality.
Generate batches locally, paste an existing UUID v7 to decode its embedded timestamp, and check whether a value is actually version 7 before using it in migration or debugging work.
UUID v7 keeps the familiar 36-character UUID representation while improving chronological locality for newly inserted records. It can make logs and database indexes easier to inspect, but ordering still depends on system clocks and should not replace an explicit sequence when strict global order is required.
The embedded timestamp reveals approximate creation time, so UUID v7 values are identifiers rather than secrets. Parsing shows the timestamp, version, variant, and random portion without looking up the value on a server.
Related tools: UUID Generator · ULID Generator