Generate random Version 4 UUIDs (Universally Unique Identifiers) and GUIDs instantly. The best free tool for developers to create unique keys.
Generate random UUIDs (Universally Unique Identifiers). Uses UUID v4 format.
Example: 550e8400-e29b-41d4-a716-446655440000
Technically, they are the same thing. UUID stands for Universally Unique Identifier, while GUID stands for Globally Unique Identifier (mostly used in Microsoft systems). Our tool generates codes that work perfectly as both.
v4 UUIDs are generated using random numbers, making collision (two identical codes) mathematically impossible.
Unlike v1 (which uses MAC addresses), v4 is anonymous and secure.
It is the industry standard for database keys (Primary Keys) and API tokens.
You can generate a UUID in modern browsers using: `crypto.randomUUID()`. Or simply use our tool for quick testing.
In Python, you can use the built-in library: `import uuid; print(uuid.uuid4())`.
Yes. A Version 4 UUID has 2^122 possible combinations. The chance of generating the same UUID twice is practically zero.