UUID Generator

Generate universally unique identifiers (UUIDs) for all major versions (v1, v4, and v5). Our free online tool is perfect for developers needing unique IDs for databases, software, and distributed systems.

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. The main purpose of UUIDs is to enable distributed systems to create unique identifiers without needing a central coordinating authority. The probability of two independently generated UUIDs being identical is virtually zero.

Understanding the UUID Versions

Different UUID versions are generated using different algorithms, making them suitable for specific use cases:

• Version 1 (Time-based): Generated using a combination of the current timestamp and the generating computer's MAC address. This makes them ideal for creating time-sortable and unique IDs.
• Version 4 (Random): Generated from purely random or pseudo-random numbers. V4 UUIDs are the most common choice as they do not expose any information about the system they were created on.
• Version 5 (Name-based, SHA-1): Generated by hashing a "namespace" (another UUID) and a "name" (a string). This means the same namespace and name will always produce the exact same UUID, which is useful for creating reproducible identifiers.

Why Use Our UUID Generator?

Our tool is a fast and secure solution for all your UUID needs. All generation happens entirely on your device (client-side), so your inputs are never sent to our servers. With support for multiple versions and the ability to generate UUIDs in bulk, it's a reliable and convenient tool for any developer.