IBAN Validator
Enter an international IBAN and instantly check whether it passes the modulo-97 check. The tool also validates the official length for the issuing country and shows the check digits.
IBAN number
The international IBAN (ISO 13616) is checked with the modulo-97 algorithm (full-number validation) and each country's official length.
Validation result
How to use: Validate IBAN
- 1Paste the IBAN (spaces and dashes are ignored).
- 2The tool checks the country, the length and the check digits.
- 3See whether it's valid and copy the formatted IBAN.
What is it for?
- Avoid bank transfers rejected because of a mistyped IBAN.
- Validate client or supplier bank details.
- Check direct debit forms.
How an IBAN is validated
Structure
An IBAN starts with the country code (two letters), two check digits and the national account number (BBAN). Spanish ones have 24 characters: ES + 2 digits + 20 digits.
Check algorithm
The start is moved to the end, letters are converted to numbers (A=10…Z=35) and the remainder when divided by 97 is calculated: it must be 1. It catches typing errors but does not guarantee the account exists.
Security
Validation runs in your browser. Even so, avoid sharing IBANs in public channels.
Related tools
Frequently asked questions
Can I validate an IBAN outside Europe?+
Yes. The tool supports more than 60 countries: Spain, Portugal, France, Germany, Italy, United Kingdom, Brazil, Morocco and many more.