UUID Generator
Generate version-4 UUIDs in your browser using the Web Crypto API.
4e031fa7-e8ac-4965-822d-c0a9782923a7
v4 is fully random (122 bits of entropy). Generated locally with the Web Crypto API; nothing is sent to a server.
Per RFC 9562, v1/v6/v7 embed a creation time. Decoded entirely in your browser — nothing is uploaded.
Runs in your browser. Your input is not uploaded to PayloadIQ.
A version-4 UUID is a 128-bit identifier whose bits are essentially all random, written as 36 characters in the familiar xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx shape. This tool builds each one with crypto.randomUUID(), which draws from the same cryptographically strong random source the browser uses elsewhere — so you can paste them straight into seed data, test fixtures, or new database rows.
Practical tip: v4 UUIDs are random, not ordered, so using them as a primary key can fragment a B-tree index and hurt insert performance on large tables. When ordering or locality matters, reach for a time-sortable scheme such as UUIDv7 or ULID instead.