DNS Label Normalizer

Normalize domain labels with case conversion, IDN detection, and homograph attack analysis.

Case Normalization Converts labels to lowercase following DNS case-insensitivity
IDN Detection Identifies internationalized domain names and punycode encoding
Security Analysis Detects homograph attacks and mixed script vulnerabilities

Example Labels

Domain Labels

About DNS Label Normalization

Case Normalization

DNS labels are case-insensitive. This tool converts all labels to lowercase for consistency and comparison.

Example.COM → example.com

IDN Processing

Internationalized Domain Names use punycode encoding. This tool detects IDN labels and potential encoding issues.

москва.рф ↔ xn--80adxhks.xn--p1ai

Security Analysis

Mixed scripts in labels can indicate homograph attacks. This tool warns about potential security risks.

googlе.com (Cyrillic 'е')

Best Practices

Always normalize labels before comparison. Be cautious of mixed scripts and visually similar characters from different scripts.

Normalize → Compare → Validate