Postal Code Validator
Validate postal and ZIP codes for 40+ countries with format, length, and character checks.
Enter a postal code above
Select a country and we will validate the format
What we check
Format
Matches the expected postal code pattern for the selected country
Length
Postal code length is within the valid range
Characters
Contains only valid characters (letters, digits, spaces, hyphens)
Learn More
Learn how postal codes differ across countries and how to validate them for accurate address data.
What Is Postal Code Validation?
Postal code validation verifies that a ZIP code or postal code matches the expected format for its country. Each country defines its own postal code system with specific patterns — some use only digits, others mix letters and numbers, and the lengths vary from 3 to 10 characters.