About IBANCalc
IBANCalc is an independent suite of banking validation and calculation tools engineered for maximum speed, strict client-side privacy, and zero paywalls.
Our Mission
Accurate banking data is critical for SEPA transfers and global cross-border payments. A single transposed digit in an account number causes payment rejections, delayed settlements, and costly bank reversal penalties. Many commercial tools lock basic bulk checking behind paywalls, subscription plans, and account registrations. IBANCalc was built to keep financial calculations open, instant, and completely free for individuals and businesses alike: from our IBAN calculator and instant IBAN checker to our unlimited bulk IBAN checker.
Why All Calculations Run in Your Browser
Banking details belong to the highest echelon of personal data. By executing all validation algorithms and check digit computations client-side in your web browser, your account details never touch our servers. No database logs your financial numbers.
Official Banking Data Sources
Our routing directories and validation algorithms adhere directly to the authoritative specifications published by monetary authorities:
- SWIFT: Official ISO 13616 IBAN Registry specifications and BIC standards (ISO 9362)
- Deutsche Bundesbank: Quarterly German Bankleitzahlen (BLZ) directory and 140+ official check digit methods
- Banque de France / ACPR: REGAFI directory for French bank codes
- Banco de España: Registry of licensed Spanish credit institutions
- Banca d'Italia: Official register of Italian banks and ABI codes