Validate IBAN numbers instantly. Check bank account correctness, verify country format, and detect errors before transfers. Free online IBAN checker — no data stored.
Click to test with these valid IBAN examples:
An IBAN (International Bank Account Number) is an internationally agreed system for identifying bank accounts across national borders. Our IBAN validator checks the structure, length, and checksum of any IBAN to ensure it is valid before you make a transfer. The validation uses the official MOD-97 algorithm and country-specific length rules.
IBAN stands for International Bank Account Number. It is a standardized format for identifying bank accounts internationally, making cross-border transfers more efficient and error-free. An IBAN can be up to 34 characters long and includes a country code, check digits, and the bank account number.
IBAN validation uses the MOD-97 algorithm (ISO 7064). The process involves moving the first four characters to the end, converting letters to numbers (A=10, B=11, etc.), and dividing the resulting number by 97. If the remainder is 1, the IBAN is valid.
No. This tool only validates the format and checksum of the IBAN. It cannot verify whether the account is active, has funds, or belongs to a specific person. For that, you need to contact the bank or use a payment service.
Yes. All validation is done entirely in your browser. Your IBAN is never sent to any server, stored in a database, or logged anywhere. You can safely validate any IBAN without privacy concerns.