UUID Generator
Generate random v4 UUIDs, one or thousands at a time. Free, no sign-up.
About UUID Generator
A UUID is a 128-bit ID that is practically guaranteed to be unique. This tool creates random version 4 UUIDs using your browser’s secure random number generator.
How to use UUID Generator
- Choose how many UUIDs you need.
- Pick uppercase or remove hyphens if needed.
- Copy the list.
Frequently asked questions
Can two UUIDs ever be the same?
In theory yes, but the chance is so small that it is ignored in practice. You would need billions of IDs per second for many years.
What is the difference between UUID and GUID?
They are the same thing. GUID is the name Microsoft uses.
Are these UUIDs secure?
They use crypto.randomUUID, which is cryptographically random.
More developer tools
See all →JSON Formatter
Beautify, minify and validate JSON with error lines.
Base64 Encode / Decode
Encode text to Base64 or decode it back, with UTF-8.
URL Encode / Decode
Percent-encode or decode URLs and query strings.
Hash Generator
SHA-1, SHA-256, SHA-384 and SHA-512 of text or files.
Unix Timestamp Converter
Convert epoch time to a readable date and back.
QR Code Generator
Make QR codes for links, text, Wi-Fi and UPI.