How to use Japanese Corporate Number Check
- 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
Does it show the company name?
No. It only checks the format. Use the National Tax Agency search site for names.
Does a valid result mean the company exists?
It means the number is well-formed; it does not confirm registration.
Is it safe to use Japanese Corporate Number Check 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.