UUID Generator
Choose how many identifiers you need, then generate. Each value is a UUID version 4: random bits with the version and variant bits set. Copy one row or copy the full list. A new click replaces the list; earlier values are not kept.
Ctrl or Cmd+Enter generates a new list.
Result
What UUID v4 is
A UUID is a 128-bit identifier written as five hex groups. Version 4 fills most of those bits from a cryptographic random source in this browser. The chance of a collision in ordinary use is tiny, but a UUID is still not a secret and not a proof of identity. This page does not issue UUID v1 time-based values.
When this tool helps
Use the generator when a form, a test fixture, or a local note needs a unique ID, and you do not want to invent one by hand. Generate again when you need a fresh batch. If two clicks ever showed the same row, that would be a browser random-source failure; in normal use each click should differ. Do not treat a UUID as a password.
Questions
Are the values unique across clicks?
Each generate draws new random bits. You should see a new list every time. The page does not check uniqueness against a server.
Can I copy a single UUID?
Yes. Each row has its own Copy button. Copy all places every value on the clipboard, one per line.
Do the identifiers leave this tab?
No. They are created in the browser and only leave if you copy them yourself.