About the UUID Validator Online Free Tool

The UUID Validator Online Free Tool checks whether each submitted value matches the canonical hyphenated UUID format. Enter one UUID per line to receive a clear pass or fail result and, when available, the version identified by the UUID's version digit.

The validator accepts uppercase or lowercase hexadecimal characters. Its accepted pattern covers version digits 1 through 8 with the expected variant bits, plus the all-zero nil UUID and the all-f maximum UUID.

How to Validate a UUID

1. Paste one or more UUID values into the input field, using one line for each value.
2. Select Validate UUID.
3. Review the pass or fail result beside every non-empty line.
4. For accepted versioned UUIDs, check the reported version number.

Accepted UUID Format

A standard input uses five groups of hexadecimal characters in an 8-4-4-4-12 pattern, such as 550e8400-e29b-41d4-a716-446655440000. The tool does not accept compact UUIDs without hyphens, values enclosed in braces, or strings prefixed with urn:uuid:.

What a Valid Result Means

A pass result means the text matches the format, version digit, and variant pattern recognized by this validator. It does not prove that the identifier was generated securely, exists in a database, belongs to a particular record, or is unique among other UUIDs.

UUID Validator FAQ

Can I validate several UUIDs at once?
Yes. Enter one value per line to check them as a batch.

Are uppercase UUIDs accepted?
Yes. Hexadecimal letters are matched without regard to case.

Does the tool identify the UUID version?
Yes, for accepted versioned UUIDs with version digits from 1 through 8. Nil and maximum UUIDs are labeled separately.

Does validation confirm that a UUID is unique?
No. The tool checks the text pattern only.