UUID versions compared

Choose v4 for random identifiers

Version 4 uses cryptographic randomness. It is useful when an identifier does not need to expose its creation time. A UUID is an identifier, not a password or access-control check.

Choose v7 for time-oriented identifiers

Version 7 includes a Unix timestamp in milliseconds plus random bits. This supports time-oriented storage, but exposes approximate creation time. Do not rely on perfect global ordering across devices or clocks.

Generate a batch locally

Select a version and number of results, then choose Generate. Each line is one UUID. Copy or download the list; Quietkit does not save it. Changing settings clears the old output so it cannot be mistaken for a new batch.

UUID Generator: choose Batch of 10 and Generate. There is one identifier per line. Use ULID / Nano ID Generator for a 26-character time-sortable identifier or a 21-character random identifier.