UUID Generator
UUID Generator: free, fast and private. Works in your browser, nothing is uploaded, no sign-up needed.
How to use
Generate random UUIDs (version 4) or time-ordered UUIDs (version 7) in bulk, with options for uppercase and hyphen-free output. They are created with your browser’s secure random generator. UUIDs are useful as unique identifiers for database records, files and API requests.
- Paste or type your input.
- Adjust the options.
- Copy the result.
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Frequently asked questions
What is the difference between v4 and v7?
Version 4 is fully random. Version 7 starts with a timestamp so values sort by creation time, which is friendlier to database indexes.
Can two UUIDs collide?
The chance is astronomically small for random UUIDs, so they are treated as unique in practice.
Is it free?
Yes. All tools are free, with no sign-up and no limits.
Is my code or data uploaded?
No. Everything runs locally in your browser, so your code and data stay private.
Does it work on mobile?
Yes. It works in any modern mobile or desktop browser.