IBAN Validator — Official mod-97 Check, Locally

How to use

1. Paste the IBAN (spaces are ignored).
2. Press Validate.
3. Read verdict + parsed parts.

General information only — not medical, financial or legal advice. Figures cross-checked against public official sources (IRS / HMRC / NHS / WHO guidance) as of 2026-08. For decisions that matter, confirm with a licensed professional in your country.

About this tool

A single mistyped digit in an IBAN can bounce an international payment. This validator implements the official ISO 13616 check: country-specific length table, character set rules, and the mod-97 checksum (remainder must equal 1). It also shows the parsed country code and bank identifier so you can sanity-check the origin. Everything runs locally — bank details are sensitive, and they never leave this page. Your file never leaves this page — everything runs in your browser, there is no upload endpoint on this site, and the file is dropped from memory when you close the tab.

FAQ

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