Handitab

Postcode Validator

Check whether postal codes match the official format for the US, UK, Canada, Australia, Germany, France, Japan, and other countries.

About Postcode Validator

A postcode validator checks that a postal code has the right shape for its country, for example five digits for a US ZIP code or the outward and inward parts of a UK postcode. This tool tests each line against a format pattern for one of 13 countries. A pass means the code is well formed. It does not prove that the code is assigned to a real address, which requires a postal address database.

How to use Postcode Validator

  1. Type or paste into the "Postal codes (one per line)" box, or press "Use example" to try it with sample data.
  2. Set "Country" if the defaults do not fit.
  3. The result appears below and updates as you type.
  4. Copy the result with the copy button, or download it as a file where that is offered.

Questions about Postcode Validator

Can a correctly formatted postcode still be wrong?

Yes. Format rules describe which letters and digits may appear in each position, but not every allowed combination has been issued. Only a lookup against postal authority data confirms that a code exists.

Runs in your browser. Page last updated .

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