IBAN Validator

About this calculator

This tool checks whether an IBAN (International Bank Account Number) is structurally valid by verifying its length against the issuing country's format and running the mod-97 checksum defined in the ISO 13616 standard — the same check-digit algorithm banks use internally to catch typos before a transfer is submitted.

It's used before sending or receiving an international wire transfer, since a single mistyped digit in an IBAN can send money to the wrong account or get a payment rejected outright. Freelancers invoicing foreign clients, accountants processing supplier payments, and anyone entering payroll or vendor bank details double-check the IBAN here first, because catching an error before submission is far easier than chasing down a failed or misdirected transfer afterward.