What IBAN validation means
IBAN validation checks whether the number follows the expected technical rules for an International Bank Account Number. It is useful for finding many formatting and typing errors.
IBAN Validator Online
Use this online IBAN validator to validate an IBAN number, check whether the IBAN format is valid, and confirm the ISO 13616 checksum. This is technical IBAN validation only.
Check IBAN
Result: Invalid
- Formatted IBAN: -
- Country code: -
- Country: -
- Expected length: -
- Entered length: 0
- Length valid: Invalid
- Checksum valid: Invalid
This tool checks IBAN format and checksum only. • It does not confirm that an account exists or who owns it. • It does not provide official bank confirmation. • Checks run in your browser. • Entered IBANs are not stored.
How to validate an IBAN number online
Paste the IBAN into the validator, submit the check, and review the country code, expected length, actual length and checksum result. Spaces are ignored so formatted and unformatted IBANs can be validated.
IBAN format validation
The validator removes spacing, uppercases letters, checks the country code, and compares the normalized number with the expected IBAN pattern for supported countries.
Country-specific length validation
Each IBAN country has a fixed length. A German IBAN has 22 characters, a Belgian IBAN has 16, and a Polish IBAN has 28.
Checksum validation
The checksum check uses the standard mod-97 method. A valid checksum helps catch many transcription errors but does not prove that an account exists.
Limits of IBAN validation
This tool checks IBAN format and checksum only. It does not confirm that an account exists or who owns it. It is not an official banking confirmation.
FAQ
What makes an IBAN valid?
A valid IBAN has a supported country code, the expected country-specific length, and a checksum that passes the mod-97 calculation.
How do I validate an IBAN number online?
Enter the IBAN with or without spaces. The validator normalizes it, checks the country code and length, then runs the checksum calculation.
Does a valid checksum mean the account exists?
No. The checksum only confirms technical structure. It does not check live bank records, account status or account ownership.
Why is country length important?
IBANs use fixed lengths by country. A wrong length is a strong sign that characters are missing, extra, or typed incorrectly.
What is mod-97 validation?
Mod-97 validation is the standard IBAN checksum calculation. It rearranges and converts the IBAN, then checks whether the remainder equals 1.
Is this validator suitable for international IBANs?
Yes for supported IBAN countries and technical checks. It is not a bank lookup and cannot confirm account existence internationally.