UUID Generator
Bulk UUID v4 & time-ordered v7 (RFC 9562), client-side
Why people choose us
Private by design
Your input is processed securely and never sold. Client-side tools never leave your browser at all.
Instant & free
No installs, no waiting. Results in seconds, right in your browser, on any device.
Free forever
No sign-up, no watermarks, no limits. All client-side tools are free to use as much as you like.
Frequently asked questions
UUID v4 vs v7 — which should I use?⌄
v4 is fully random and is the safe default. v7 embeds a millisecond timestamp in the high bits, so values sort by creation time — ideal as database primary keys because inserts stay index-friendly. Both are standardized in RFC 9562.
Can generated UUIDs collide?⌄
v4 has 122 random bits: you would need to generate about 2.7×10¹⁸ UUIDs for a 50% chance of a single collision. For practical purposes, collisions do not happen.
Are these UUIDs generated on your server?⌄
No — everything runs in your browser with crypto.randomUUID() and crypto.getRandomValues(). The list is never transmitted anywhere.