How to use
- Paste the value into the validation field. \n
- Review format and check-digit feedback. \n
- Fix the input if needed — nothing is sent to a server.
What it's for
Validate Japanese postal codes.
About the document
Japanese postal codes are 7 digits, commonly written as XXX-XXXX.
Also useful
Need an example? Try the postal code generator.
FAQ
- Does this query official databases?
- No. Validation is algorithmic and local only.
- Does data leave my browser?
- No. Everything runs locally on your device.
Related tools
- Postal Code GeneratorGenerate Japanese postal codes (XXX-XXXX).
- My Number GeneratorGenerate Japanese My Numbers with check digit.
- Corporate Number GeneratorGenerate Japanese corporate numbers with check digit.
- Credit Card GeneratorGenerate fictional cards that pass the Luhn check.
- Password GeneratorGenerate strong passwords with composition options.
- Random Number GeneratorDraw random numbers with range and quantity controls.