Generate UUIDs in bulk
UUIDs, also called GUIDs, are the unique identifiers behind database rows, files, API keys and countless other things that need a label guaranteed not to clash. This tool generates version 4 (random) UUIDs, one or up to a thousand at a time, with the formatting options you actually need. It runs in your browser using secure randomness, so nothing is uploaded.
How to use it
- Choose how many you need, up to 1000 in one go.
- Format them: uppercase, without hyphens, or wrapped in braces, to match your system.
- Copy all with a single click and paste them where you need them.
Random, unique and safe to trust
Version 4 UUIDs are generated with crypto.randomUUID, your browser's built-in secure generator. The chance of two of them ever colliding is so small that they are treated as unique in practice, which is exactly why they are used for keys and identifiers across so many systems. Because everything happens locally, you can generate as many as you need without any of them being sent anywhere.
More generators
For plain numbers in a set range there is the random number generator, and for turning titles into web addresses there is the slug generator. Every Etoolio generator runs in your browser, free and unlimited.