Generate random UUIDs (Version 4)
Click Generate
Click the Generate button to create a new UUID (Universally Unique Identifier).
Choose format options
Select uppercase/lowercase and whether to include hyphens.
Copy the UUID
Click the Copy button to copy the generated UUID to your clipboard.
Yes, our UUID Generator is completely free with no limits. Generate as many UUIDs as you need, whether it is one or thousands, without any registration or cost.
Yes, our generator uses your browser's built-in crypto.randomUUID() function, which relies on cryptographically secure random number generation. This ensures that each UUID is virtually guaranteed to be unique. The probability of generating duplicate UUIDs is astronomically low (about 1 in 2^122).
A UUID (Universally Unique Identifier) is a 128-bit identifier that is guaranteed to be unique across all devices and time. UUIDs are commonly used as database primary keys, session identifiers, file names, and any situation where you need a unique identifier without coordinating with a central authority.
This tool generates Version 4 (v4) UUIDs, which are based on random numbers and are the most commonly used type. Other versions include v1 (timestamp-based), v3 and v5 (namespace-based using MD5 or SHA-1), and v7 (time-ordered). V4 is ideal for most use cases where you simply need a random unique identifier.