How to use Postal Code Lookup
- Type the text or URL you want to turn into a QR code.
- Reorder or adjust the settings, then hit the big button.
- When it's ready, click "Save." Your files never leave your device.
FAQ
Where does the data come from?
Japan Post for Japan and GeoNames (CC BY 4.0) for other countries, refreshed when the site is updated.
Is what I type sent anywhere?
No. The postal dictionary is loaded from this site and searched on your device.
Is it safe to use Postal Code Lookup with my files?
Yes. Your files are never uploaded — they're processed only inside your browser. Every page is served with a policy that blocks outgoing connections (Content-Security-Policy connect-src 'none'), and the counter in the bottom-left shows the data sent: 0 bytes.
Is it free? Do I need an account?
It's completely free, no account needed, and there are no usage limits.
Does it work on my phone?
Yes. It works in mobile browsers on iPhone and Android. For very large files, a computer will be faster.