IBAN Validator
Validate IBANs for 70+ countries: country length and mod-97 checksum, with UK sort code breakdown. Free and private: runs in your browser.
Paste one IBAN per line, with or without spaces.
Numbers are checked locally in your browser and never sent anywhere. Use test data, not real customer details.
Use cases
- Validate test data for payment and banking flows.
- Catch typos in account and card details before calling a provider API.
- Explain money-handling rules to your team with real examples.
Frequently asked questions
Does a valid IBAN mean the account exists?
No. Validation proves the format and checksum are right (catching typos). Only the bank, or a confirmation-of-payee service, can confirm the account.
Is the IBAN Validator free?
Yes. It is free with no sign-up, and it runs entirely in your browser, so your input is never uploaded or stored.
Can I use real customer data here?
Avoid it. Everything runs locally, but good practice (and PCI DSS) is to use test data outside production systems.
Related tools
Checking one snippet is a start. Scan your whole repository for free with CodeInspector.