UUID Generator

Generate bulk UUIDs (v1, v3, v4, v5, v6, v7) with custom formatting.

What is this Tool?

UUID Generator allows you to generate Universally Unique Identifiers (UUIDs) instantly. Whether you need a single ID for a database primary key or thousands for testing, this tool handles it all.

A UUID (Universally Unique Identifier) is a 128-bit label used for information in computer systems. It's designed to be unique across space and time without central coordination.

How to use

  1. Select Version: Choose between v4 (Random) - most common,v1 (Time-based), or the new v7 (Time-ordered).
  2. Set Quantity: Need bulk IDs? Enter a number up to 1000.
  3. Format: Toggle Uppercase or Remove Hyphensto match your database requirements.
  4. Generate & Copy: Click generate, then use the Copy Allbutton to grab the list.

Why do you need it?

  • Version 4 (Standard): Best for general use. It uses cryptographically strong random numbers to ensure uniqueness.
  • Version 7 (New Standard): Time-ordered like v1 but with better sorting properties. Ideal for database keys where sort order matters.
  • Secure & Private: All IDs are generated locally in your browser using the Web Crypto API. No data is ever sent to our servers.

FAQ

Q. When should I use v4 vs v7?

Use v4 for general uniqueness. Use v7 if you are using UUIDs as primary keys in a database (like PostgreSQL/MySQL) and want them to be sortable by creation time for better performance.

Q. Is collision possible?

Theoretically yes, but practically no. The chance of a v4 collision is 1 in 2^122. You could generate billions per second for a century and likely never match.