Taiwan business number (UBN) checker
Check whether an 8-digit Taiwan unified business number is valid, using the Ministry of Finance check-digit rule. Paste many at once.
⭐ Use this often? Press Ctrl+D (⌘+D on Mac) to bookmark it — next time it is one click away.
How to use
- Type or paste one or more numbers.
- Each one is checked instantly.
- A valid result means the number is well-formed; it does not say who owns it.
Questions
- Are my files uploaded anywhere?
- No. Everything runs inside your browser on your own device. Your files are never sent to our servers.
- Is it free?
- Yes. No sign-up, no watermark, no limit on how many times you use it.
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