- Country
- GB
- Length
- 22 / 22
- Bank identifier
- WEST
- Account portion
- 12345698765432
- Checksum remainder
- 1
Online IBAN Validator and Checker
Check IBAN country format and checksum locally, then inspect the bank identifier and account portion without exposing financial data. It helps payment and finance teams catch mistyped international bank account numbers before a transfer workflow reaches a bank.
What is an IBAN validator?
An IBAN validator checks the International Bank Account Number structure used for cross-border payments. It verifies the country-specific length, allowed characters, and mathematical check digits.
How to use this IBAN checker
Paste an IBAN with or without spaces. The result identifies the country, reports whether the checksum is valid, and separates the bank identifier from the remaining account portion.
Checksum is not account verification
A valid checksum only means the number is structurally plausible. It does not confirm ownership, account status, or that a payment will succeed.
How to use IBAN Validator for related tasks
Paste the IBAN with or without spaces, confirm the country length and checksum, and remember that a valid format does not prove the account exists.
Related tools: Certificate Decoder, Number / Byte Formatter.
Frequently asked questions
How is an IBAN validated?
The tool checks the country-specific length and characters, then moves the country code and check digits to the end and verifies that the resulting number has a modulo-97 remainder of 1.
Is my bank account number uploaded?
No. IBAN normalization, validation, and breakdown happen entirely in your browser.
Does a valid checksum prove the account exists?
No. A valid IBAN format and checksum do not confirm that a bank account is open, owned by a person, or able to receive payments.
Can an IBAN checksum checker verify a bank account?
It can verify structure and checksum only; bank ownership, account status, and payment reachability require the financial institution.