Tool World

UUID Generator

Generate unique UUIDs

Generate universally unique identifiers (UUIDs) for your applications. Create version 4 random UUIDs instantly for databases, APIs, and software development.

Frequently Asked Questions

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. It is designed to be unique across space and time, making it ideal for distributed systems.

How is a UUID generated?

UUIDs are generated using algorithms that ensure their uniqueness. Common methods include random number generation, timestamp-based generation, and hashing of various data elements.

What are the common use cases for UUIDs in web development?

UUIDs are commonly used for unique identification in databases, session management, object references, and anywhere a unique key is needed without coordination between multiple systems.

Are UUIDs truly unique?

While UUIDs are designed to be unique, there is a very small probability of collisions occurring, especially in the case of random UUIDs. However, for most practical applications, the likelihood is negligible.

Can I use UUIDs in any programming language?

Yes, UUIDs can be generated and used in virtually all programming languages. Most languages have libraries or built-in functionalities to create and manipulate UUIDs easily.