How the uuid generator works
Last updated 10 November 2026
A UUID is a unique label that can be created without asking a central system. Version 4 UUIDs are made from random numbers.
How it works
- Each UUID comes from your browser’s secure random number generator.
- The version and variant bits are set as the standard requires.
What a UUID is
A UUID is a long label that is unique for all practical purposes. It looks like several groups of letters and numbers separated by hyphens. Software uses UUIDs as identifiers for records, files, orders and sessions because they can be made on any device without checking a central list.
Version four
This tool makes version four UUIDs, which are built from random numbers. Your browser's secure random number generator supplies the numbers, and the version and variant bits are set as the standard requires. The chance of two matching is so small that it is ignored in practice.
Typical uses
- Test data and sample records
- Identifiers for rows in a database
- File names that must not clash
- Tracking codes in logs and messages
Not a secret
A UUID is an identifier, not a password. Do not use one as the only protection for something private. Anyone who sees it can use it, and some systems show identifiers in web addresses. For secrets, use the password generator or the passphrase generator.
Making many
Choose how many you want and copy the whole list. Each one is created in your browser and none are stored or sent anywhere. You can switch the hyphens and the upper case on or off to match the format your system expects.
Things to watch
- They are not secrets. Use the password generator for those.
Nothing generated here is stored or logged.
Like every tool on MoneyMzansi, this one runs entirely in your browser. There is no account, no upload and no sign-up, so it keeps working even if your connection drops once the page has loaded.