UUID Generator
Generate cryptographically random UUID v4 or time-ordered UUID v7 (RFC 9562). Bulk output, multiple formats — no hyphens, uppercase, braces, URN — and one-click copy.
UUID v4 is the universal random identifier: 122 bits of randomness, no clock dependency, suitable as a default for most applications. UUID v7 embeds a millisecond timestamp in the high bits so the values sort by creation time — this is what you want when UUIDs become primary keys, since database B-tree pages stay packed and inserts stay cheap.
Generate up to 1000 at once and pick a format: standard, no hyphens, uppercase, wrapped in braces (Microsoft style), or as a urn:uuid: URN. All randomness comes from the browser’s crypto.getRandomValues — UUIDs never leave your machine.
Random 122-bit UUID — recommended general-purpose identifier.