BankCodeKit

Bulk IBAN tool

Bulk IBAN Validator

Paste one IBAN per line and validate the list locally in your browser. No file upload, no server processing, and no stored account details.

Bulk local check

Validate IBANs in bulk

Paste one IBAN per line. The list is processed locally in your browser and is not uploaded.

One IBAN per line. Do not paste payment details you do not need to check.

All data is processed locally in your browser. Nothing is uploaded.

How the bulk IBAN validator works

The validator reads each non-empty line in the textarea, normalizes spaces and hyphens, and checks each IBAN using the same local format and checksum logic as the single IBAN checker.

What this tool checks

  • Supported IBAN country code.
  • Expected country-specific IBAN length.
  • Allowed characters after normalization.
  • MOD97-10 checksum status.
  • Invalid reasons for each failed line.

What this tool does not check

  • It does not upload or import files.
  • It does not confirm account existence or ownership.
  • It does not confirm payment success.
  • It does not save IBANs in browser storage or on a server.

FAQ

Is the pasted list uploaded?

No. The textarea contents are processed locally in your browser.

How is the CSV created?

The CSV is generated in the browser from the current validation results. No server is involved.

Does a valid row prove the account is real?

No. A valid result only means the format and checksum pass the supported rules.