UUID Validator
Paste a UUID to check whether it is valid — complete with the reason if it is invalid and a component breakdown if it is valid. Everything is processed on your device.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
550e8400-e29b-41d4-a716-446655440000
Example Output
✓ VALID — UUID v4
How to Use
- 1Paste the a UUID you want to check into the input box.
- 2If the tool offers extra options (e.g. dialect, flags, or variant), set them as needed.
- 3Click Validate (or press Ctrl+Enter).
- 4Read the result badge — VALID, INVALID, or VALID with a warning — along with the details and the list of issues, if any.
About UUID Validator
UUID Validator checks whether a string is a well-formed UUID/GUID (8-4-4-4-12 hexadecimal digits). It also reads the version (v1–v8) and variant (RFC 4122) from the right bit positions, and recognizes the special NIL and MAX UUIDs.
This is purely about shape: it does not guarantee the UUID is unique or was ever generated, only that the format is valid. Useful before using a UUID as a database key or in an API route.
FAQ
Is my data sent to a server?
No. All validation runs in your browser with JavaScript. Nothing is uploaded, logged, or stored on our servers — safe for sensitive data.
How is this validator different from a parser or formatter?
A validator answers one question: is this input correct/valid? It returns a valid/invalid badge with the reason. A parser breaks input into its components, and a formatter tidies its layout. Use a validator when you just need to confirm something is sound before using it.