UUID Generator

Generate standard-compliant UUIDs (Versions 1, 3, 4, 5) with custom formatting options for developers.

Randomly generated UUID. The most common and secure choice for general use.

Formatting

Uppercase

Hyphens

Wrap in Braces {}

Quantity: 1

Click generate to create UUIDs

Understanding UUID Versions

Generated from the current time and the MAC address of the computer generating it. Helpful when you need to sort IDs by creation time.

Generated from a namespace identifier and a name using MD5 hashing. Same namespace + same name = same UUID.

Generated using random numbers. The most common version. Probability of collision is astronomically low.

Similar to v3 but uses SHA-1 hashing, which is stronger. Preferred over v3 for new applications requiring name-based IDs.

Yes, v4 UUIDs are practically unique. v1 depends on time/MAC. v3/v5 are unique for their specific inputs.

Use v4 for most database/key purposes. Use v5 if you need deterministic IDs based on a name (like a URL).

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