Check a UUID and identify its version

Before an entry, import or submission, this helps teams and individuals catch a malformed value early. Check a UUID and identify its version.

Check a UUID and identify its version. The result appears instantly in your browser, ready to copy, with no account, upload or storage involved.

How to use

Paste the UUID you want to check into the input field, or import a text file containing the value to inspect.
Run the verification to let the tool inspect the structure and detect the version when possible.
Read the result to see whether the identifier is valid and which UUID version it matches.
Clear the field with the erase action before testing another identifier.
If you check several values, empty the field between runs so the results do not get mixed up.

Example

Using the provided example, you can see right away whether the string follows the expected pattern and which UUID version is detected. The result panel shows the validation and identification, so you do not have to inspect the format manually. This helps you catch a bad value before using it in a database or an API.

Input

550e8400-e29b-41d4-a716-446655440000

Limits and formats

The checker confirms syntax and likely version; it cannot prove that an identifier exists in a database or is unique.
A malformed value may still look valid if it keeps the correct structure.
UUIDs without hyphens or in unusual casing may be rejected depending on the rules applied.
Always review the result before using it in a critical import.
The tool does not replace validation inside your application or database.

Where processing happens

The entire check runs inside your browser. The entered string is not sent anywhere, and no remote storage is used while the validation is performed.

Frequently asked questions

Which UUID versions can this checker identify?

It recognises the common versions supported by the validation logic, including versions 1, 3, 4 and 5 when the structure matches. The output either names the detected version or tells you that the value is not a valid UUID.

Can I test an identifier from a file instead of typing it?

Yes. You can import a text or CSV file containing the identifier, then start the check. The tool reads the value and displays the same kind of result you would get from manual input.

What should I do when the result says the UUID is invalid?

Check the length, the hyphen positions and the characters used. Correct the string and verify it again to confirm that it now follows the expected UUID format.