UUID Generator
Generate random UUID v4 identifiers in bulk, locally
About UUID v4
A UUID (universally unique identifier) is a 128-bit value used as a practically-unique key for database rows, API idempotency keys, file names, and more. This tool generates version 4 (random) UUIDs using your browser's cryptographically secure random source, entirely on your device.
FAQ
Are these UUIDs really unique?
Version 4 UUIDs draw 122 random bits, so the chance of a collision is astronomically small — safe to treat as unique in practice without a central coordinator.
Are they generated on a server?
No. They're generated locally with crypto.randomUUID(), so the values never leave your browser.
What version are they?
UUID version 4 (random). You can tell because the 13th hex digit is always 4.