UUID Generator
Generate version 4 UUIDs in bulk. Pick how many you need, copy them one by one or all at once.
Version 4 UUIDs, built from your browser's secure random number source.
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit label that looks like 550e8400-e29b-41d4-a716-446655440000. It is designed so that two of them will practically never match, even when they are generated on different computers at different times. That makes UUIDs perfect whenever you need a one-of-a-kind ID without a central authority handing them out.
What are UUIDs used for?
Developers use UUIDs as primary keys in databases, as IDs for API resources, as session tokens, and as unique file names for uploads. Because they can be generated anywhere without checking a central list, they work well in distributed systems where many servers create records at the same time.
Frequently asked questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit label like 550e8400-e29b-41d4-a716-446655440000. It is designed so that two of them will practically never be the same, even when generated on different computers.
What does version 4 mean?
Version 4 means the UUID is built from random numbers. This generator creates version 4 UUIDs using your browser's secure random number source.
What are UUIDs used for?
Developers use them as unique keys for database rows, API resources, session tokens, and file names - anywhere a one-of-a-kind ID is needed.
Can two UUIDs ever be the same?
In theory yes, in practice no. There are so many possible version 4 UUIDs that a collision is far less likely than being struck by lightning twice.
Are the generated UUIDs stored anywhere?
No. They are generated in your browser and nothing is saved or sent to any server.