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IBAN Formatter

Format IBAN into 4-character groups and validate the mod-97 checksum

Format an IBAN into 4-character groups and validate the mod-97 checksum.

Formatted IBAN

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Groups of 4 separated by spaces. Checksum uses the ISO 7064 mod-97-10 algorithm.

How to use

  1. Type or paste a raw IBAN into the input field (spaces allowed or stripped).
  2. The formatted IBAN grouped in blocks of 4 appears instantly below.
  3. Check the valid or invalid indicator to confirm the ISO 7064 mod-97 checksum.
  4. Copy the formatted result for use in forms or documents.

Examples

  • Pasting DE89370400440532013000 produces DE89 3704 0044 0532 0130 00 with a green "valid" indicator.
  • Entering a scrambled sequence such as DE00370400440532013000 shows a red "invalid" checksum failure.

Verify outputs before using in production. No warranty — see Terms.