UUID Generator

Generate random UUIDs (v4) instantly. Create single or bulk UUIDs with customizable format options.

Bulk Generation

How It Works

  1. Click the Generate button to create a new UUID v4.
  2. The UUID appears instantly in the output field.
  3. Click Copy to save it to your clipboard.
  4. Click Generate again to create another unique identifier.

Example

Input: (click Generate)
Result: 550e8400-e29b-41d4-a716-446655440000

FAQ

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. Version 4 UUIDs are randomly generated and are practically unique across all devices worldwide.

UUID v4 has 122 random bits, giving 2^122 possible values. The probability of a duplicate is astronomically low — you would need to generate 2.7 quintillion UUIDs to reach a 50% chance of collision.

No. UUIDs are generated entirely in your browser using the Web Crypto API. No data is ever sent to any server.

Yes. UUID v4 is widely supported in databases including PostgreSQL, MySQL, SQL Server, and MongoDB as primary keys or unique identifiers.