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Business Validation

IBAN Validator Online Free

Check an IBAN with country-aware length validation, structural checks and the MOD-97 checksum.

IBAN validation workspace

Browser only

Check country support, expected country length, structure and the MOD-97 checksum locally.

Checks passed

Country code

PASS

United Kingdom (GB) detected.

IBAN country

PASS

United Kingdom uses 22 characters in an IBAN.

Check digits

PASS

Characters 3–4 must be numeric check digits.

Country-specific length

PASS

Current length: 22; expected for United Kingdom: 22.

Characters

PASS

Only letters and digits are allowed after spaces/separators are removed.

MOD-97 checksum

PASS

Calculated remainder: 1. A valid IBAN checksum has remainder 1.

Parsed value

Country
United Kingdom (GB)
Expected length
22
Check digits
82
BBAN / national part
WEST12345698765432
Length
22
Grouped display
GB82 WEST 1234 5698 7654 32
Country-aware validation uses a local IBAN country/length table in addition to the MOD-97 checksum. A country/length/checksum pass still does not confirm that an account exists or can receive payments.
Validation is not verification. A passing result only means the entered value satisfies the checks implemented on this page. It does not prove bank-account ownership, bank/branch existence, VAT registration, active status, payment safety or tax eligibility. Verify important business data using the responsible bank, authority, registry or controlled onboarding process.

About this tool

Use the IBAN Validator to normalize an International Bank Account Number, identify its country, compare its length with the expected country format and run the standard MOD-97 checksum. The workflow is transparent and browser based, making it useful for data cleanup, onboarding checks and pre-payment review while clearly separating validation from official bank verification.

How to use it

  1. Paste or type an IBAN; spaces and separators are normalized automatically.
  2. Review the detected country, expected length, check digits, BBAN and MOD-97 result.
  3. Copy the normalized or grouped IBAN, then verify critical payment details with the responsible bank or controlled onboarding process.

Important notes

  • • A valid checksum does not prove account ownership, account status or payment reachability.
  • • Country formats can evolve; verify critical use against the current IBAN registry or banking documentation.
  • • Do not use generated or sample identifiers to impersonate real accounts or organisations.

Related tools

SWIFT/BIC ValidatorVAT Number ValidatorView collection

Frequently asked questions

Does the IBAN Validator check country-specific length?

Yes. For countries in the tool's local IBAN table it checks the expected country length before running the MOD-97 checksum.

Does a valid IBAN checksum prove the bank account exists?

No. A structural and checksum pass does not prove account ownership, account status, payment reachability or that the account can receive a particular transfer.

Is my IBAN uploaded?

No account is required and the interactive validation runs in your browser.