What tool do you want?
Construct / deconstruct / validation of IBAN (international bank account numbers)

Describe the solution you'd like
I'd like to enter an IBAN and have a) checked if it is valid, b) see details about bank, country, etc.
It should also be possible to enter national bank details (BIC/SWIFT and account number) to get an IBAN.

Is their example of this tool in the wild?
https://www.ibancalculator.com/
https://github.com/gocardless/ibandit

Additional context
n/a