IBAN Validator
Free online iban validator that runs entirely in your browser.
How the IBAN Validator works
The IBAN Validator works on IBANs (one per line) and shows the result as you type. The same input always gives the same answer — refresh the page and you will see exactly the same figure.
Formula used
IBAN Validator is computed by the formula below, using the inputs you provide.
Inputs used: IBANs (one per line).
Worked example
Take the default example — ibans (one per line) of ToolFactory:
- list: BAD TOOLFACTORY
- okCount: 0
- total: 1
Frequently asked questions
- Is the IBAN Validator free?
- Yes. There is no signup, no usage limit and no watermark — the checker runs entirely in your browser.
- Does the IBAN Validator store or send my data?
- No. Every calculation happens locally in the page, so the numbers you type are never uploaded or logged.
- Does it work on a phone and offline?
- Yes — the page is a single lightweight file that adapts to any screen size. Once it has loaded it keeps working without a network connection.
- What inputs does the IBAN Validator need?
- IBANs (one per line). Change any of them and the result updates instantly.