AkousaIBAN Validator
Validate International Bank Account Numbers (IBAN) format and checksum.
About IBAN Validator
The IBAN Validator performs the complete three-step validation process defined by ISO 13616 and the ECBS standard: it checks that the country code is a valid ISO 3166-1 alpha-2 code participating in the IBAN scheme, verifies the total IBAN length matches that country's registered format (ranging from 15 digits for Norway to 34 for Malta), and performs the MOD-97 checksum calculation by rearranging the IBAN and computing the remainder. All 80+ participating countries and their BBAN formats are supported, covering European, Middle Eastern, and Caribbean banking systems.
How to Use
Enter an IBAN in the input field with or without spaces — the tool strips spaces automatically before validation. The validator displays the country code and name, the expected and actual length, the extracted check digits, and the MOD-97 computation result. On successful validation it also parses and labels the BBAN components (bank code, branch code, account number) where the country IBAN registry format defines their positions.
Common Use Cases
- FinTech developers implementing client-side IBAN validation in payment forms to catch entry errors and invalid IBANs before submitting to banking APIs that charge per failed transaction
- Finance operations teams verifying batch IBAN imports from customer onboarding spreadsheets before initiating SEPA Credit Transfer or Direct Debit payment runs to avoid costly rejected payment fees
- Payment gateway engineers testing their IBAN validation logic against edge cases like Norwegian 15-digit IBANs, Maltese 31-digit IBANs, and accounts from countries with non-standard BBAN structures
- Compliance and anti-fraud analysts quickly verifying whether suspected synthetic IBANs in fraud reports pass the MOD-97 checksum test before escalating to the relevant financial institution
- Accounting software developers building multi-country payroll or accounts payable systems that must validate IBANs from 30+ European and Middle Eastern banking jurisdictions with different format rules