IBAN Validator - Free, Instant, In Your Browser
Paste an IBAN below (e.g. DE89 3704 0044 0532 0130 00) to check its checksum.
How to use IBAN Validator
- 1Paste your text or data into the input box above.
- 2IBAN Validator runs instantly, right in your browser.
- 3Copy the result or use it directly.
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
What's the formula?
The last two digits of the country code block form a MOD 97-10 checksum (ISO 7064) over the rearranged account number - this catches most typos.
Is my data sent to a server?
No - everything runs entirely in your browser with JavaScript. Nothing is uploaded.