Postal Code Validator

Postal code validation checks whether a given postal code (also called ZIP code, postcode, or PIN code) conforms to the format rules of a specific country. Each country defines its own postal code format — US ZIP codes are 5 digits (or 5+4), UK postcodes use alphanumeric formats like SW1A 1AA, Canadian codes use A#A #A# format, and Australian codes are 4 digits.

This tool supports 50+ countries with built-in format validation rules and can auto-detect the country from the postal code format if no country is selected. E-commerce developers, form validators, and logistics professionals use postal code validation to ensure accurate address data, reduce shipping errors, and improve customer experience during checkout.

1. Enter postal code — Type or paste the postal code into the input field.
2. Select country — Optionally choose a specific country or leave "Auto-detect".
3. Click Validate — Press Validate to check format rules.
4. Try examples — Valid Example for correct codes, Invalid Example for errors.