Five random UUIDs
UUID Generator
Use this free UUID generator to create browser-generated UUID v4 values for identifiers, test data, database records, and development workflows.
Research-backed assumptions Formula steps Examples included Private in-browser use
How to use the uuid generator
- Enter how many UUID v4 values you need.
- Choose uppercase or no-hyphen formatting only when another system expects it.
- Press Generate UUIDs and copy the output.
- Use UUIDs as identifiers, not as passwords, secrets, or authorization proof.
Common uses
Generate IDs for mock data, test records, fixtures, or local prototypes.
Create one UUID or a small batch at once.
Choose uppercase or compact no-hyphen formatting when another system needs it.
Avoid sending identifier-generation requests to a server.
Examples
Uppercase formatted UUID
32-character identifiers
Frequently asked questions
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
When should I use the UUID Generator?
Use it when your task matches one of these common needs: Generate IDs for mock data, test records, fixtures, or local prototypes. Create one UUID or a small batch at once. It works best when you already know the values, dates, units, or settings the page asks for.
What is the UUID Generator doing with my inputs?
In plain language: The generator creates random bytes in the browser, sets the UUID version and variant bits for UUID v4, then formats the identifier. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
What should I double-check before trusting the answer?
UUIDs are useful identifiers, but they do not prove identity, authorization, ordering, or secrecy by themselves. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.
Does the site save what I enter?
No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.
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