UUID v7 Generator

This tool generates version 7 UUIDs, the modern, time-ordered identifier designed to be both unique and naturally sortable by creation time. A UUID is a 128-bit value used to identify things without a central authority, but the older random version 4 has a drawback for databases: because its bits are random, new UUIDs scatter throughout an index, hurting insert performance and locality. Version 7 fixes this by putting a millisecond timestamp in the leading bits, followed by random bits for uniqueness. The result is an identifier that is still practically guaranteed to be unique, yet sorts in roughly the order it was created, which keeps database indexes tidy and makes UUID v7 the recommended choice for new primary keys. This generator creates them for you. You choose how many UUIDs you want, and the calculator produces that many version 7 identifiers, each with a fresh timestamp and cryptographically strong random bits, in the standard 8-4-4-4-12 hexadecimal format. A regenerate button gives you a new batch whenever you need one. Everything runs locally in your browser using its secure random source, so the identifiers are never sent anywhere, which matters when they are used as keys. The results update as you change the count. Use it to seed a database with sortable keys, to generate test identifiers, to learn how version 7 is structured, or wherever you would otherwise reach for a UUID but want time ordering. Because several generated in the same millisecond share the timestamp prefix, the random portion keeps them distinct and the overall order still tracks creation time. You can spot a version 7 UUID by the digit seven at the start of its third group, just as version 4 has a four there.

Version 7 UUIDs embed a millisecond timestamp then random bits, so they sort by creation time. Generated locally with a secure random source; nothing is uploaded. Up to 50 at a time.