Codes and Test Data
Random Zip Code Generator
Generate zip and postal codes in the format you need for testing address forms and demos.
Random Zip Code Generator
US 5 digit zip
How many zip codes
Generate US zip codes
This tool creates random United States zip codes, the five digit postal codes, with an option to add the four digit extension for a full nine digit ZIP+4. They suit testing address forms, validation and sample data sets.
Five digits or ZIP plus four
A basic zip code is five digits. The longer ZIP+4 adds four more digits after a dash to point at a smaller delivery area. Tick the option to include the extension when a form or system expects the full form.
Plausible, not mapped
The codes fall in the range real zip codes use, so they look right in a form, but they are random and not matched to any real place. Everything is built in your browser with nothing sent anywhere.
Popular generators
Frequently asked questions
What format are these
United States zip codes, five digits, with an option for the nine digit ZIP+4 form.
Are they real postal codes
They fall in the plausible range and look valid, but they are random and not tied to a real location.
What is ZIP plus four
Four extra digits after the five digit code that narrow delivery to a smaller area. Tick the box to add them.
Can I make several
Yes, up to 500 at once, ready to copy or export.
Is it free
Yes, free and with no sign up.
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For phone test data see the phone number generator, or an address country field with other test tools.