Random US ZIP code generator
Generate random 5-digit US ZIP codes for testing forms, sign-ups and address validation. Fictitious test data.
Random five-digit ZIP test values
Generate one or many zero-padded five-digit values for testing fields that expect the basic US ZIP format. The output is useful for layout checks, fixtures, import tests and client-side validation.
The generator checks the numeric shape only. It does not query the USPS address database, so a generated value is not guaranteed to be an active ZIP Code or to identify a real city, state or delivery route.
Choose the right test for your form
- Use these values when you only need to test a five-digit mask.
- Add your own ZIP+4 cases when the field supports the 12345-6789 format.
- Use an authoritative postal dataset when city, state or deliverability must be verified.
- Include empty, short and non-numeric values in negative validation tests.
Frequently asked questions
- Are all generated ZIP Codes active?
- No. The tool generates correctly padded five-digit test values, not a verified list of active USPS ZIP Codes.
- Does it generate ZIP+4?
- No. The current output is the basic five-digit ZIP format.
- Can I use the result to validate a shipping address?
- No. Shipping validation needs an authoritative address or postal database.