UUID Validator

Overview

• Validates whether the entered string is correctly formatted as a standard UUID (8-4-4-4-12, hyphen-separated).
• If the format is valid, displays the value normalized to lowercase along with its detected version number (1-8).
• Accepts both uppercase and lowercase input, with the result always displayed in lowercase.

Usage

1. Enter the UUID you want to validate into the input field.
2. Click the "Validate" button.
3. If the format is correct, the normalized value and version are displayed; otherwise an error is shown.

Example

550E8400-E29B-41D4-A716-446655440000

Normalized: 550e8400-e29b-41d4-a716-446655440000
Version: version 4

Use Cases

• Checking whether a UUID entered by a user or received from another system is correctly formatted before saving it
• Checking a UUID's version (such as random v4 vs. time-based v1) to verify it was generated the way you expect
• Catching a UUID that lost part of its characters during copy-paste, via a validation error

FAQ

Notes

• Only the standard 8-4-4-4-12 hyphenated format is supported. A UUID without hyphens is judged invalid.
• If the version digit doesn't fall between 1 and 8 (as with a Nil UUID), the version is displayed as "Unknown".
• This only checks the format. It does not check whether the UUID is actually in use within your system, such as for duplicates.