UUID Generator
Generate random UUID v4 identifiers. Supports bulk generation, uppercase, and no-dash formats. 100% client-side.
No data sent to serverRelated Tools
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier that is guaranteed to be unique across space and time. UUID v4, the most commonly used version, is generated using random or pseudo-random numbers. The format follows the pattern xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where x is a random hexadecimal digit and y is one of 8, 9, a, or b.
Common Use Cases
UUIDs are widely used as database primary keys, session identifiers, API request tracking IDs, file naming conventions, and distributed system identifiers. They eliminate the need for a central authority to assign unique IDs, making them ideal for microservices and distributed architectures.