ZIP Code Validator

ZIP Code Validator

Quickly validate US ZIP codes to check if they follow the correct format. This tool supports both standard 5-digit ZIP codes (e.g., 90210) and ZIP+4 codes (e.g., 90210-1234). Enter one or more ZIP codes to instantly see which are valid and which are not.

Comment utiliser

• Enter one ZIP code per line in the input field
• Results appear automatically as you type
• Each ZIP code is marked as Valid or Invalid with its format type
• Click “Try an example” to see sample ZIP codes and their validation results

Caractéristiques

• Dual Format Support – Validates both 5-digit and ZIP+4 format codes
• Validation en masse – Check multiple ZIP codes at once, one per line
• Résultats en temps réel – Validation runs automatically as you type
• Clear Summary – See total count of valid and invalid codes at a glance