v4 unique IDs
This tool generates version 4 UUIDs — randomly generated 128-bit identifiers used throughout software development to uniquely label records, sessions, and objects without needing a central authority to hand them out.
Generating a unique primary key for a new database record.
Creating a unique session, request, or tracking ID during development.
Producing test data with guaranteed-unique identifiers.
Version 4 UUIDs are generated from 122 random bits, making the odds of two ever colliding astronomically small in practical use.
They're generated using your browser's secure random number source, suitable for use as unique identifiers.
ToolBench runs this tool entirely in your browser. Your file or text is processed on your own device using JavaScript — nothing is uploaded to a server, nothing is stored, and there's no sign-up wall between you and the result. That's true of every one of the 500+ tools on this site, from PDF utilities to unit converters.