Check IBANs before payments fail

Check and generate IBANs in seconds, free in your browser or automated via API. Catch transposed digits and typos directly at input.

Start free with your own API key

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Check an IBAN for plausibility.

The check determines whether an IBAN can actually have been issued by a credit institution.

Detect typing errors or deliberate incorrect entries in good time and thus save unnecessary costs for return debit notes.

Just enter an IBAN and the software checks if it could be valid.

generate IBAN

The check determines whether an IBAN can actually have been issued by a bank.

Recognize typographical errors or deliberate incorrect entries in good time and thereby save unnecessary costs for returned direct debits.

Simply enter your sort code and account number and the software will then generate your IBAN.

IBAN API pricing

Choose the right package for IBAN validation via API.
From a free starting point to high validation volumes for shops, SaaS products and automated SEPA processes.

* Offers only for commercial use, prices excl. VAT.

Frequently asked questions

Have questions about IBAN-Test? You will find answers about using the service, the API, checking and generating IBANs and more in the FAQ section.

Can I use IBAN-Test for free?

Use IBAN validation and IBAN generation in the browser; start API usage with your own API key.

Can I use IBAN-Test for free?

Yes. You can use IBAN-Test in the browser to validate IBANs or generate an IBAN from bank code and account number.

For automated checks in shops, forms, back-office systems or your own applications, use the IBAN-Test API. New users can start with free checks and switch to an API package when they need higher volume.

Are entered IBANs or account details stored?

How entered IBANs, account numbers and bank codes are handled.

Are entered IBANs or account details stored?

No. IBANs, account numbers and bank codes entered for validation or generation are not stored permanently.

Account and API access data is stored only where needed for your user account, API quota, billing, security and abuse prevention. More information is available in the Privacy Policy.

Why are not all countries supported?

Why IBAN-Test supports countries with reliable validation rules and bank data.

Why are not all countries supported?

IBAN-Test supports countries where reliable rules and data are available for IBAN structure, check digits and bank data validation.

A basic IBAN format check is possible for many countries. Deeper bank data validation with bank name, city or BIC only makes sense where reliable bank directories are available. We prefer fewer countries with clearer validation quality over broader coverage with uncertain results.

How can I contact IBAN-Test?

How to contact IBAN-Test for IBAN validation, API, MCP, account or invoice questions.

How can I contact IBAN-Test?

If you have questions about IBAN validation, IBAN generation, API access, MCP, your account or an invoice, please use the contact form.

Briefly describe what you want to validate or what problem occurred. This helps us route your request faster.

App for Android and iOS

Check IBANs on the go

With the IBAN-Test app for Android and iOS, you can use the most important website features conveniently on your smartphone.

Check and generate IBANs on the go in just a few seconds, with a clear interface and direct access to the familiar IBAN-Test functions.

You can find the app as "IBAN-Test" on Google Play and in the Apple App Store, or directly here:

Questions or suggestions?

Do you have questions or suggestions about our products? We look forward to hearing from you.

Bank data validation

Validation against bank directories

For these countries, we check IBANs against available bank directories and return bank details such as institution, city and BIC when available.

DEGermany ATAustria BEBelgium FRFrance LULuxembourg NLNetherlands PTPortugal ESSpain

IBAN syntax check

Format checks for 111 IBAN countries

Check IBANs for a valid structure, correct length and checksum. This helps you catch typos and transposed digits before a payment fails. Additional bank validation against real bank directories is available for the countries listed above.