Your identifiers will appear here
Choose how many you need and press Generate.
Generate one or multiple UUID v4 identifiers instantly in your browser.
How it works
For test data, database rows and API keys in development.
From one to a hundred at a time.
The browser’s cryptographic randomness is used, the same source as crypto.randomUUID.
Copy them all in one click or download the list as .txt.
More free browser tools on Nano Banana Lab.
A 128-bit identifier made of random bits, written as 36 characters with dashes. Version 4 means the value carries no time or machine information.
In practice, no. The number of possible values is so large that a repeat is not something real systems plan for.
They are unpredictable because they come from a cryptographic random source, but a UUID is an identifier, not a password — do not use one as an access token.
No. They are generated by your browser, so they never travel over the network.