UUID Validator
Validate and analyze UUID strings to ensure they conform to RFC 4122 specifications.
You can enter UUID with or without hyphens, in uppercase or lowercase, and with or without braces/parentheses.
Batch Validation
Batch validation allows you to validate multiple UUIDs at once.
UUID Validation Explained
UUID validation ensures that a string conforms to the UUID format specified in RFC 4122. A valid UUID consists of 32 hexadecimal digits, typically displayed in 5 groups separated by hyphens (8-4-4-4-12).
This validator checks:
- The correct number of characters
- Whether all characters are valid hexadecimal digits
- The UUID version (stored in the 13th digit)
- The UUID variant (stored in the 17th digit)
Different UUID versions have different generation algorithms: Version 1 (time-based), Version 3 (MD5 hash), Version 4 (random), Version 5 (SHA-1 hash), and Version 7 (time-ordered).
UUID Validation Tool: Ensure Your UUIDs Are Valid
Our UUID validator tool helps developers and system administrators verify that their UUIDs conform to the RFC 4122 standard. This is crucial for ensuring data integrity and proper operation of systems that rely on UUIDs for identification.
What Makes a UUID Valid?
A valid UUID must conform to several criteria as specified in RFC 4122:
- It must contain exactly 32 hexadecimal digits (0-9, a-f, A-F)
- The digits are typically arranged in 5 groups separated by hyphens, following the pattern 8-4-4-4-12
- The version number (13th digit) must be 1-7, indicating which algorithm was used to generate the UUID
- The variant (17th digit) must follow specific bit patterns that indicate the UUID's format
Common UUID Validation Issues
When validating UUIDs, these are common issues our tool can detect:
- Incorrect length (too few or too many characters)
- Invalid characters (non-hexadecimal characters)
- Invalid format (incorrect placement of hyphens)
- Invalid version number (not 1-7 in the 13th position)
- Invalid variant bits (incorrect values in the 17th position)
UUID Version and Variant Analysis
Beyond basic validation, our tool provides detailed analysis of UUIDs:
- UUID Version Detection: Identifies which version (1-7) of the UUID algorithm was used to generate the identifier
- Variant Analysis: Determines the UUID variant, which specifies the layout of the UUID
- Formatting Information: Shows the standard-formatted version of the UUID, regardless of how it was input
Why UUID Validation Matters
Validating UUIDs is important in several contexts:
- Database Integrity: Ensuring that UUIDs used as primary keys are correctly formatted
- API Development: Verifying that UUID parameters conform to expected formats
- Data Migration: Checking that UUIDs are valid when transferring data between systems
- Debugging: Identifying issues with UUID generation in applications
- Security: Preventing injection attacks or data corruption through malformed UUIDs