RIB key calculator
The clé RIB, worked out.
Output
Paste or type above to see the result here.
Your files stay on your device
This tool runs entirely in your browser. What you paste is processed on your device and is never sent to a server, so it is safe to use with tokens, keys and unpublished text.
How it works
- Paste one number a line; dots, dashes and spaces are fine.
- Each is checked for its length and its check digits.
- The result shows each step of the calculation, and where a number fails.
Frequently asked questions
- How is the clé RIB calculated?
- Letters in the account number become digits (A and J = 1, B, K and S = 2 …), then key = 97 − ((89 × bank + 15 × branch + 3 × account) mod 97).
- Can I paste an IBAN?
- Yes: a French or Monaco IBAN contains the RIB, which is split out and checked.
- Does a valid check digit mean the number exists?
- No — only that it is correctly written. Whether it was issued, and to whom, only the issuing authority can say. The checker never makes up numbers either: it checks the ones you type.
- Is anything uploaded?
- No. The check is worked out in your browser, and nothing you type leaves your computer.