Bulk IBAN Checker – Check up to 100 IBANs Free
Validate up to 100 IBANs simultaneously: identify invalid check digits in real-time and export full validation results to CSV — 100% free with no sign-up or paywalls.
How Bulk Validation Works
Paste your list of IBANs from Excel, ERP records, or invoice manifests into the box above (one IBAN per line or comma-separated). The validator executes client-side mathematical MOD-97 checks across all entries, showing instant status indicators, bank names, and plain-language error reasons for invalid rows. If you only need to verify an individual account in detail, use our single IBAN checker.
Export Results to CSV
Once verified, click the „Export Results to CSV“ button to download a complete spreadsheet containing original IBANs, validity flags, bank names, BIC codes, and detailed failure diagnostics for rapid correction in your accounts payable workflow. If you need to calculate an IBAN from local bank code and account details, use our IBAN calculator.
Free Forever – No Premium Tier
Competitor services routinely lock bulk validation behind expensive monthly subscriptions, credits, or registration gates.
IBANCalc takes a fundamentally different architecture: Because all verification calculations run 100% on your machine's processor via client-side JavaScript, we don't incur heavy server compute costs per check. This enables us to provide free, unlimited bulk validation for up to 100 accounts per batch without collecting your email address or requiring a payment method. If you need synthetically generated test accounts for development, check our IBAN generator.