Free UUID Generator
Generate random version 4 UUIDs — one or a hundred at a time, with optional uppercase and no-hyphen formats.
How to use / FAQ
Choose how many UUIDs you need, then hit Generate — or copy them all at once. Use the toggles for uppercase letters or to strip the hyphens. Every UUID is a random version 4 identifier created on your device.
What kind of UUID is this?
Version 4 — 122 bits of randomness from your browser's cryptographically secure generator (crypto.randomUUID). The odds of a collision are negligible, so they're safe as database keys, request IDs, or file names.
What's the difference between v4 and other UUID versions?
Version 4 is fully random, which is what you want for keys and IDs that need no ordering. Other versions embed a timestamp or a namespace hash instead; this tool generates v4 only.
Can I generate many at once?
Yes — enter any count from 1 to 100. Each one has its own copy button, and 'Copy all' puts the whole batch on your clipboard, one per line.
Are these generated on a server?
No. The randomness comes from your own browser, so nothing is requested from or logged by any server.