IBAN Validator

Check if an IBAN is valid in seconds. Verifies country code, length and checksum and shows bank code.

IBAN

Spaces and lowercase letters are fine. We check format, length and checksum.

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IBAN Validator Online

Check if an IBAN is valid in seconds. Verifies country code, length and checksum and shows bank code.

IBAN Validator: Check if an IBAN Is Valid

Typing an IBAN wrong can delay or bounce a payment. Paste an IBAN here and the validator instantly checks its country code, length and checksum, and shows you what is wrong if it fails. It checks that the number is correctly formed. It cannot tell you whether the account exists or who owns it.

How to check an IBAN

1. Paste or type the IBAN. Spaces and lowercase letters are fine.
2. Click Validate.
3. Read the result: valid, or the specific problem found.
4. Copy the formatted IBAN if you need it.

What the validator checks

Country code: the first two letters must belong to a country that uses IBANs.
Length: each country has one fixed IBAN length.
Characters: only digits and letters in the allowed positions.
Checksum: the two check digits must pass the standard mod-97 test.

How the checksum works

The tool moves the first four characters to the end, converts letters to numbers (A=10 through Z=35), and divides the resulting number by 97. If the remainder is 1, the checksum passes. This catches most typing mistakes such as a wrong or swapped digit.

Valid does not mean the account exists

A valid IBAN has the right shape and checksum. It does not prove the account is open, belongs to a particular person, or can receive money. For payments, confirm account details with the recipient through a trusted channel.

Common reasons an IBAN fails

A digit was mistyped or two digits were swapped.
The IBAN is from a country with a different length than the one entered.
A letter O was typed instead of zero, or I instead of 1.
Extra characters were copied with the number.

Frequently asked questions

What is an IBAN?

An IBAN (International Bank Account Number) is a standard format for identifying a bank account across borders, mainly used in Europe and many other countries.

How do I check if an IBAN is valid?

Paste it into the validator. It checks the country code, length and checksum, and tells you the result immediately.

Does a valid IBAN mean the account exists?

No. The validator confirms the IBAN is correctly formed, not that the account is real or active.

Can I include spaces in the IBAN?

Yes. Spaces are ignored, and the tool also accepts lowercase letters.

How long is an IBAN?

It depends on the country. The maximum is 34 characters.

Is it safe to enter my IBAN here?

The IBAN is sent for validation. As good practice, never enter anything beyond the IBAN itself, such as PINs or passwords.

Why does my IBAN fail even though it looks right?

Check for a wrong or swapped digit, a letter O in place of a zero, or a length that does not match the country.

About this tool

How to use: Paste or type the IBAN, then validate it.

Country code and length checked
Checksum verified with mod-97
Formatted IBAN displayed
Spaces and lowercase letters accepted

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