UUID Generator

Generate v4 and v1 UUIDs in Bulk

A UUID generator creates universally unique identifiers you can use as primary keys, request IDs, file names, or any place you need a value that is practically guaranteed not to collide. This tool produces version 4 UUIDs, which are randomly generated, and version 1 UUIDs, which are time-and-node based. You can generate a single identifier or a large batch at once, then copy them all or download them as a file for seeding a database or fixtures.

How it works

Generation happens entirely in your browser with JavaScript, using the platform's cryptographic randomness for v4 values. Nothing is requested from a server, so the identifiers are created on your machine and never transmitted. Choose the version, set how many you need, and the list is produced instantly, formatted in the standard 8-4-4-4-12 hyphenated layout. Generating a fresh batch is a single click, so you can regenerate as many times as you like when seeding data or rerunning a test, and copy or download the full list without any per-request limit.

Practical use cases

• Seed a development database with unique primary keys
• Create correlation or request IDs for logging and tracing
• Generate stable identifiers for test fixtures and mock data
• Produce unique file or resource names for a script

UUIDs pair naturally with other generators and utilities here: try the NanoID Generator for shorter URL-friendly IDs, the Password Generator for secure secrets, or the Hash Generator when you need deterministic digests instead.

Since every identifier is generated in-browser, no values are logged, stored, or sent anywhere, which matters when a UUID becomes part of your system. The tool is free, requires no account, and works in all modern browsers, including mobile.