UUID/GUID Generator

Generate bulk random unique identifiers (v4).

Configuration
Generated UUIDs

What is a UUID?

A Universally Unique Identifier (UUID) is a 128-bit label used for information in computer systems. The term GUID (Globally Unique Identifier) is also used, typically in Microsoft software.

How does this generator work?

This tool generates Version 4 UUIDs, which are completely random. It uses the browser's cryptographic API (crypto.randomUUID() or fallback) to ensure specific uniqueness and security suitable for most development needs.

  • Version 1: Date-time and MAC address (not generated here)
  • Version 4: Random (generated here)
  • Version 5: SHA-1 hash of namespace and name

When to use UUIDs?

UUIDs are perfect for database primary keys, session IDs, and transaction IDs where you need to generate identifiers without a central authority ensuring uniqueness. They are particularly useful in distributed systems and microservices.