IBAN checker – online and via API

Check IBAN format, length and check digits. For 40 countries, we also check the bank identifier against bank directories. Use the IBAN checker and generator free in your browser, or start with 10 free API requests every 24 hours.

Start free with your own API key

Check nowGenerate now

  • 50,000+bank & branch codes
  • 7,000+BICs to identify banks
  • 1,000+Swiss clearing numbers
  • 40countries with bank data checks
  • 115IBAN formats worldwide

Test IBANs for your software tests

Copy examples for the UK and other countries, with valid and invalid test cases available as JSON and CSV.

View test IBAN examples

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.

Find more answers in our FAQ about payment methods, invoices and API plans.

Monthly figures are calculated over 30 days. The limit applies per 24 hours.

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

Frequently asked questions

Find answers about IBAN validation, IBAN generation, the REST API, MCP, privacy and payment in the IBAN-Test FAQ.

Can I use IBAN-Test for free?
Use IBAN validation and IBAN generation in the browser; start API usage with your own API key.

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.

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.

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.

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:

Download on the App Store Get it on Google Play
IBAN-Test app on an iPhone

Questions or suggestions?

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

 Contact us

Bank data validation

Bank directory checks for 40 countries

IBAN-Test goes beyond checksum-only validation. For these countries, we check the bank identifier against available bank directories and return bank details such as institution, city and BIC when available. See how IBAN validation works.

ALAlbania ADAndorra ATAustria BEBelgium BGBulgaria HRCroatia CYCyprus CZCzech Republic DKDenmark EEEstonia FIFinland FRFrance DEGermany GIGibraltar GRGreece HUHungary ISIceland IEIreland ITItaly LVLatvia LILiechtenstein LTLithuania LULuxembourg MTMalta MDMoldova MEMontenegro NLNetherlands MKNorth Macedonia NONorway PLPoland PTPortugal RORomania SMSan Marino RSSerbia SKSlovakia SISlovenia ESSpain SESweden CHSwitzerland VAVatican City

IBAN syntax check

Format checks for 115 IBAN formats

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.

MCP Server for AI Agents – Connect AI clients to IBAN validation tools – https://www.iban-test.eu/mcp – API documentation