FREE · FINANCE CALCULATORS
IBAN Validator and BIC Checker.
Check one IBAN or a thousand at once: country length and mod-97 check digits, with the printed format, the domestic account part and an optional BIC/SWIFT format check.
Loading the calculator…
How to use IBAN Validator and BIC Checker
Paste IBANs one per line, with or without spaces. Add a BIC to check its format and country. Download the results as CSV.
How it works
Each IBAN must have the length registered for its country (89 countries) and, after the first four characters are moved to the end and letters are turned into numbers (A = 10 … Z = 35), leave a remainder of 1 when divided by 97 (ISO 13616).
Example
DE89 3704 0044 0532 0130 00 is a valid German IBAN; changing the last digit to 1 fails the check-digit test.
Questions about IBAN Validator and BIC Checker
Is IBAN Validator and BIC Checker free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Checks the format and check digits only: it cannot confirm that the account exists or who owns it. Up to 1,000 IBANs at a time. Everything is calculated in your browser; nothing you type is uploaded. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.