UUID generator
Generate UUIDs (also called GUIDs) instantly: version 4 is fully random, version 7 starts with a timestamp so IDs sort by creation time. Make up to 1,000 at once and copy or download them.
- ๐ Runs on your device
- โค 0 bytes uploaded
- ๐ด Works offline
- โ Free, no sign-up, no watermark
How to use UUID Generator
- Choose v4 or v7.
- Set how many you need (1 to 1,000).
- Pick upper case, no hyphens or a wrapper if needed.
- Copy or download them.
Is it private?
Yes. UUID Generator runs entirely in your web browser. What you type is never sent to Nolo or anyone else, and the page cannot send it anywhere: its security policy only allows it to talk to nolotools.com, which has no place to receive data. Nothing is stored either: close the page and it is gone. How Nolo works.
Questions and answers
Are these UUIDs really random and unique?
Yes. They use your browser's cryptographic random number generator. A v4 UUID has 122 random bits, so the chance of a duplicate is negligible even across billions of IDs.
What is the difference between v4 and v7?
v4 is completely random. v7 (RFC 9562) puts the current Unix time in milliseconds in the first 48 bits, so IDs sort in creation order, which keeps database indexes efficient. The trade-off: anyone can read when a v7 ID was created.
Are UUIDs and GUIDs the same?
Yes. GUID is Microsoft's name for the same 128-bit format. Use the {Braces} option for the Windows style.
Are the generated IDs logged anywhere?
No. They are created on your device and never sent anywhere.
Can I check an existing UUID?
Yes. Paste it under Check a UUID to see its version and variant, and the creation time for v1, v6 and v7.