Which countries does the validator support?

All 76+ countries that use the IBAN standard are supported, including all EU member states, the UK, Norway, Switzerland, and many others.

What does the MOD-97 checksum verify?

The MOD-97 check ensures the IBAN has not been mis-typed or corrupted. It does not verify that the bank account is open or belongs to the expected person.

Is my IBAN data safe?

Yes. Validation runs entirely in your browser. No IBAN numbers are sent to any server.

Best Free Online IBAN Validator

IBAN (International Bank Account Number) validation is required in any application handling international wire transfers, SEPA payments, or bank account verification. A valid IBAN must match the country-specific format and pass a MOD-97 checksum. devtoolkit.sh's IBAN Validator checks both the format and the checksum for all 76+ countries that use IBAN, and also extracts the country code, bank code, and account number from the IBAN when the country format is known. All validation runs in your browser with no data sent to any server, making it safe for use with real customer account numbers during development and testing.

FAQ

Which countries does the validator support?: All 76+ countries that use the IBAN standard are supported, including all EU member states, the UK, Norway, Switzerland, and many others.
What does the MOD-97 checksum verify?: The MOD-97 check ensures the IBAN has not been mis-typed or corrupted. It does not verify that the bank account is open or belongs to the expected person.
Is my IBAN data safe?: Yes. Validation runs entirely in your browser. No IBAN numbers are sent to any server.