GUID Checker

Validate and analyze GUID/UUID strings with detailed format checking and version detection

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About This Tool

This GUID Checker tool allows you to validate GUID (Globally Unique Identifier) or UUID (Universally Unique Identifier) strings. It checks for proper format compliance with RFC 4122 standards, identifies the version (1-5), extracts timestamp information for version 1 GUIDs, and provides detailed analysis. Simply paste one or multiple GUIDs to validate them instantly.

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How to Use

Paste your GUID/UUID string into the text area
Choose validation options (strict format, case-insensitive)
Click 'Validate GUIDs' to check all entries
View detailed results including format validity, version, and timestamp
Use 'Clear All' to reset the form or 'Copy Results' to save output

Frequently Asked Questions

Find Quick Answers

What is a GUID/UUID?

A GUID (Globally Unique Identifier) or UUID (Universally Unique Identifier) is a 128-bit identifier used in software development to uniquely identify information. It follows the RFC 4122 standard format.

What GUID versions does this tool support?

The tool validates all standard GUID versions (1-5): Version 1 (time-based), Version 2 (DCE security), Version 3 (MD5 hash), Version 4 (random), and Version 5 (SHA-1 hash).

Can I validate multiple GUIDs at once?

Yes, you can paste multiple GUIDs (one per line or separated by commas) and the tool will validate each one individually with separate results.

What format should GUIDs follow?

Standard GUID format is 8-4-4-4-12 hexadecimal characters (e.g., 123e4567-e89b-12d3-a456-426614174000). The tool supports both uppercase and lowercase letters.

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