Generate UUIDs
Version 4 UUIDs from a proper cryptographic source — one, or five hundred for that seed script.
Runs on your device
No uploads, ever
Free, no account
How it works
- Choose how many
One for the clipboard, hundreds for filling a database column.
- Pick a style
Standard, uppercase, or braces-wrapped. Hyphens on or off.
- Copy the list
One per line, ready to paste into SQL, code or a config.
Questions people actually ask
Are these actually random?
From the browser's cryptographic generator — the same source used for encryption keys. Not the 'random' of toy languages.
Could two ever collide?
You'd need to generate a billion UUIDs a second for decades to have a realistic chance. Sleep easy.