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IBAN Validator — Check Format & Checksum Instantly

Paste an IBAN to validate it against the real ISO 13616 checksum algorithm (the same mod-97 check banks use), not just a country-specific length check — so it actually catches a mistyped digit, not only an obviously wrong format.

How to use IBAN Validator

  1. Paste the IBAN.
  2. Read the validation result — format and checksum.
  3. See the parsed country code, check digits and BBAN.

Frequently asked questions

Does a valid checksum mean the account exists?
No. Checksum validation confirms the IBAN is correctly formed and not mistyped — it cannot confirm the account is real or open, which requires the bank's own verification.
What is the mod-97 checksum?
The ISO 13616 algorithm that rearranges the IBAN and computes it modulo 97, expecting a remainder of 1 — the same check this tool runs, catching the vast majority of typos.
Which countries does this cover?
It validates any IBAN following the ISO 13616 standard, which covers all IBAN-issuing countries — the length check is country-specific and the checksum check is universal.

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