IBAN Generator

What is an IBAN?

An IBAN (International Bank Account Number) is the standard way to write a bank account number so that it can be used across borders. It is defined by ISO 13616 and is used for SEPA transfers in Europe and for international payments in many countries in the Middle East, Africa and Latin America. Every IBAN has the same three parts:

Each country registers its BBAN layout with SWIFT, the IBAN registration authority. The layout says how many characters each field has and whether it holds digits, letters or both. That is why a German IBAN always has 22 characters, a French one 27 and a Norwegian one 15.

How the generator builds a valid IBAN

1. Structure. It takes the country’s BBAN layout from the IBAN registry — for example 8!n10!n for Germany: eight digits, then ten digits.
2. Random account. Each field is filled with random characters of the right type, using your browser’s cryptographic random number generator. If you enter a bank code, it is used instead of a random one.
3. National check digits. Many countries put their own check digit inside the BBAN. The generator calculates it for 21 countries, including Belgium, France, Spain, Italy, Portugal, Norway, Finland, the Netherlands, Poland, Hungary, the Czech Republic, Croatia, Slovenia and Tunisia, so the IBANs also pass these stricter checks.
4. IBAN check digits. Finally it moves the country code and 00 to the end, turns letters into numbers (A = 10 … Z = 35), takes the remainder modulo 97 and subtracts it from 98. The result is the two check digits after the country code.

The output passes every check a form or library can make on its own: length, character pattern and checksum. You can confirm any of them, with every step shown, in our IBAN checker.

Popular IBAN formats

Germany, Pakistan, France and Italy are where most people search for test IBANs. For German IBANs, the bank code is the 8-digit Bankleitzahl; enter a real one (for example of your own bank) if your software checks that the bank exists. UK IBANs combine the first four letters of the bank’s BIC with the 6-digit sort code.

What test IBANs are for

• Form validation: check that your checkout, onboarding or payroll form accepts IBANs of every length, with or without spaces, and rejects a mistyped one.
• Test data: fill staging databases, demos and screenshots with realistic account numbers instead of real customer data, which keeps personal data out of non-production systems.
• Import and export: generate a CSV of IBANs to test bulk payment files, SEPA XML generation or data migrations.
• International coverage: make sure your database column and UI handle the longest IBANs (Saint Lucia, 32 characters) and formats with letters inside the account number, such as Malta, Qatar or Kuwait.

All supported countries

The generator covers all 90 countries and territories below. Morocco’s IBAN is used domestically but is not in the SWIFT registry. Click a country to generate IBANs for it.

Structure notation from the IBAN registry: n = digits, a = upper-case letters, c = letters or digits; the number before ! is the fixed length of the field.