UUID Generator — v4 & v7, Bulk
Create up to a thousand identifiers at once using your browser’s secure random source. Choose v4 for pure randomness or v7 when you want them to sort by time.
Up to 1000 at a time.
Three quick steps
1 · Choose
Pick the version, how many you need, and the formatting you prefer.
2 · Generate
Identifiers are produced instantly by the browser’s own cryptographic random source.
3 · Take them
Copy the whole list to your clipboard or download it as a text file.
About UUIDs
Are these safe to use in production?
Yes. They come from the browser’s cryptographically secure random generator, the same source a server-side library would use.
What is the difference between v4 and v7?
Version 4 is entirely random. Version 7 places a timestamp at the front, so identifiers sort in creation order, which databases index far more efficiently.
Are the values sent anywhere?
No. They are generated in your browser and never transmitted or logged.
Could two generated UUIDs ever collide?
In practice, no. A version 4 UUID holds 122 random bits, so the chance of a repeat is far too small to plan around.
What is the nil UUID for?
It is the all-zero identifier, used as an explicit placeholder meaning no value, rather than leaving a field empty.