UUID v4 generator
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Choose how many identifiers to generate.
How to use
- Choose a number from 1 to 100.
- Generate the identifiers.
- Copy the list or download the text file.
Example
A UUID v4 has the form xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx. Each run creates new identifiers for records or files.
Limits and security
- Generate 1–100 UUIDs per run. The browser must support the Web Crypto API; this page requires HTTPS.
- Collision probability is extremely low, but uniqueness is not mathematically guaranteed.
- UUIDs are identifiers, not passwords or authentication tokens. Do not use them as secrets.
- Generation runs locally in your browser; the values are not sent to the server.
Processing and privacy
The input is processed in this browser and is not sent to the server. Reloading the page clears the result.
Frequently asked questions
Are these UUIDs guaranteed to be unique?
No. UUID v4 is designed to make collisions extremely unlikely, but it cannot guarantee uniqueness in every system.
Can a UUID be used as a password or secret token?
No. Use an authentication system designed for secrets; these identifiers are not a substitute for passwords or access tokens.
Why does the page require HTTPS?
The Web Crypto API used for random values is available in secure browser contexts such as HTTPS.