Check whether a string is a well-formed UUID and find out which version it is. A UUID has a fixed 8-4-4-4-12 hexadecimal shape, and the version digit at a set position tells you how it was generated: version 4 is random, version 7 is time-ordered, version 1 is timestamp plus MAC, and so on. This validator confirms the overall format, reads the version and variant bits, and reports them clearly, so you can verify that an identifier coming from an API or a database is actually a valid UUID and not a lookalike. Paste one UUID per line to check several at once. Validation is done with a strict pattern locally in your browser, so the values you check are never sent to a server or logged anywhere.