UUID inspector
Paste a UUID to see what it actually contains. Version 1, 6 and 7 values carry a timestamp, and this decodes it.
What the fields mean
A UUID is 128 bits written as 32 hexadecimal digits. Two of those digits are fixed by the specification rather than random. The first digit of the third group is the version. The first digit of the fourth group carries the two-bit variant, which is why it is almost always 8, 9, a or b.
That is worth knowing if you validate UUIDs with a regular expression. A pattern that only checks for 32 hexadecimal digits in the right grouping will happily accept values that no compliant generator would produce.
For version 7 the first 48 bits are a big-endian count of milliseconds since the Unix epoch, which is what makes these values sort by creation time and what this page decodes. Version 1 uses a different and stranger clock: a 60-bit count of 100-nanosecond intervals since 15 October 1582, the date the Gregorian calendar was adopted, stored across three fields that are not in order.
Nothing you paste here is transmitted. The decoding is arithmetic on the digits, done in the page. Open the Network tab and watch it stay empty.