UUID v7 is a modern UUID format that places a Unix millisecond timestamp at the front of the identifier and fills the remaining bits with randomness. This makes the values globally unique in practice while also keeping them naturally sortable by creation time.
What This Tool Does
This generator creates UUID v7 values entirely in your browser. You can generate a single identifier or a batch of up to 100, then copy the list or download it as a text file for seed data, database records, event fixtures, or test payloads.
Current Or Custom Time
Use the current time for normal application records, import keys, and test data that should reflect when it was created. Switch to a custom timestamp when you need deterministic-looking samples, backfilled rows, replayed events, or fixtures that should sort around a specific moment.
When UUID v7 Helps
UUID v7 is useful when you want opaque identifiers that still sort well in databases, logs, queues, and distributed event streams. Compared with random UUID v4 values, UUID v7 reduces index churn because newer records tend to appear near the end of a sorted key space.
Notes on Sortability and Safety
The timestamp portion records milliseconds, not a private or secret value. If an identifier should not reveal approximate creation time, use a fully random format instead. Within one generated batch, this tool keeps values monotonic for the same millisecond while preserving the UUID v7 version and variant bits.