Check whether a string is a valid UUID (universally unique identifier), and identify its version and variant.
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Our UUID Generator creates new random version 4 UUIDs. This tool does the opposite, it checks whether a UUID string you already have is correctly formatted (the standard 8-4-4-4-12 hexadecimal pattern), and identifies its version (1-8) and variant from the bits embedded in the UUID itself.
The version digit (the first character of the third group) indicates how the UUID was generated, version 4 is random, version 1 is timestamp-based, and so on. The variant (encoded in the top bits of the fourth group) indicates which layout rules the UUID follows, the vast majority of UUIDs in use today are RFC 4122 variant.
A UUID is invalid if it doesn't match the standard 8-4-4-4-12 hexadecimal pattern, has the wrong length, contains non-hexadecimal characters, or has a version digit outside the valid 1-8 range.
No, all validation happens entirely in your browser, your data is never transmitted anywhere.
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