French RIB key calculator

See also this old blog post for an R function.

Note that we just calculate the RIB key without performing any extra check. It is meant for French numbers so we create the IBAN by just adding "FR76" at the start.

Proper validation of an IBAN number seems to be a bit hellish, so you'll most likely want to use a library like iban.js or a service like iban.com or this manual IBAN checker from Wise

That being said, the core rules are:

• The IBAN must contain only alphanumeric characters (letters and digits).
• The country code must be two letters.
• The length of the IBAN must be appropriate for the country.
• The remainder of the IBAN divided by 97 must be equal to 1.

The default account number below is random.

Parameters

Banque / Bank:

Guichet / Branch:

Compte / Account:

Output

RIB key:

Full IBAN:

Full IBAN with spaces: