An IBAN (International Bank Account Number) has a built-in checksum that detects typos. This tool validates an IBAN against that checksum and shows its country and structure — instantly and locally, with nothing transmitted.
How to use it
- Paste or type an IBAN.
- The tool checks the format and checksum.
- A valid or invalid result is shown, with the detected country.
About IBAN Validator
IBANs are used across Europe and beyond for bank transfers, and a single mistyped character can send money to the wrong place — or simply get rejected. The IBAN standard includes a mod-97 checksum specifically to catch such errors before a transfer is attempted. This validator runs that exact check and confirms the country code and length, so you can verify an account number before using it. Validation is entirely client-side, so the account number never leaves your browser.
FAQ
Does a valid IBAN mean the account exists?
No. Validation only confirms the number is correctly formed and passes its checksum. It does not check that the account actually exists.
How does the check work?
It uses the standard mod-97 algorithm defined by ISO 13616, the same method banks use to detect typos.
Is my IBAN sent anywhere?
No. The check runs entirely in your browser.