UUID Validator - Check GUID Formatting
Quickly verify if a string is a valid Universally Unique Identifier (UUID). Our UUID Validator checks the version and format of your IDs instantly, entirely within your browser.
What is a UUID Validator?
When handling large databases, APIs, or user authentication systems, it is crucial to ensure that incoming IDs are properly formatted UUIDs (or GUIDs). A UUID is a 36-character alphanumeric string (including hyphens) that follows a strict hexadecimal structure. This tool uses precise Regular Expressions to analyze your input string, confirming whether it matches standard UUID formats and identifying its version (e.g., v1, v4, v5). The validation occurs securely on your local device, guaranteeing your database IDs are never leaked.
Why Use Our UUID Validator?
- Instant Verification: Confirms validity in milliseconds.
- Version Detection: Identifies whether the UUID is version 1, 3, 4, or 5.
- 100% Private: Validation happens via local JavaScript regex, protecting your database keys.
- Bulk Checking: Paste multiple IDs to check them all at once.
How to Use the UUID Validator
Paste the UUID (or list of UUIDs) into the input box.
Click the 'Validate' button.
Review the results to see if the structure is valid and what version it is.
Identify any malformed IDs immediately.
Frequently Asked Questions
A UUID is invalid if it has the wrong length, contains non-hexadecimal characters (other than hyphens), or has hyphens in the wrong positions.
No. It strictly performs a pattern analysis on the text string you provide. It does not check if the UUID exists in a database.
Yes. Because the tool operates entirely client-side without any server communication, your keys remain completely private.
All file processing is performed locally in your web browser. We do not upload, store, or view your data.