Validate a UUID
What this is
A strict checker tests 8-4-4-4-12 hex, version nibble 1–8, and variant 8/9/a/b. Hyphens optional if you reinsert them. This is the same idea as the regex library’s UUID pattern, with version decoding on top.
Open the generator — v4, v7, and v5 in this tab.
FAQ
- Uppercase?
- Hex is case-insensitive. Canonical form is lowercase.