UUID Generator

Single UUID

Multi UUID

About UUID

The UUID Generator is a tool that generates universally unique identifiers (UUIDs). UUIDs are 128-bit numbers that can be used to identify information in computer systems. They are unique across time and space, and can be used to identify resources without requiring a central authority.

The generator supports two modes of operation: single UUID and multi UUID. In single UUID mode, it generates a single UUID each time the "Generate UUID" button is clicked. In multi UUID mode, it generates multiple UUIDs at once and displays them in a list format.

The UUIDs generated by this website are version 4 UUIDs, which are generated using a random number generator.

The concept of a universally unique identifier (UUID) has been around for decades. It was first introduced in 1995 by the Open Software Foundation (OSF) as a way to uniquely identify objects in distributed computing environments.

The original UUID specification defined a 128-bit identifier that could be generated using various algorithms, including random number generators and time-based algorithms. The goal was to ensure that no two UUIDs would ever collide, even in large distributed systems with millions of objects.

Over time, the UUID specification has been refined and expanded. Today, there are several variants of UUIDs that can be generated using different algorithms and formats. Some variants are designed to be more compact or easier to read, while others are optimized for security or performance.

One of the most commonly used variants is version 4, which uses a random number generator to generate a 128-bit UUID. This variant is widely supported in programming languages and frameworks and is often used as a unique identifier for objects in databases, APIs, and other systems.

Another popular variant is version 5, which uses a hashing algorithm (usually SHA-1 or SHA-256) to generate a UUID based on a namespace and a unique identifier. This variant is often used for applications where determinism is important, such as distributed file systems and peer-to-peer networks.

Overall, UUIDs have become an essential tool for developers working on distributed systems and other applications that require globally unique identifiers. They offer a reliable and efficient way to generate unique identifiers that can be used to track objects and transactions across multiple systems and platforms.

If you're a developer working with UUIDs, it's important to choose the right variant and algorithm for your application. You should also be aware of the limitations of UUIDs, such as the fact that they are not completely random and can potentially collide if generated using the wrong algorithm.

In summary, UUIDs are a powerful tool for developers working on distributed systems and other applications that require unique identifiers. By understanding the history and evolution of UUIDs and choosing the right variant and algorithm for your application, you can ensure that your code is efficient, reliable, and secure.