IBAN / BIC Validator — Free, Browser-Based, No Upload

Paste any IBAN or BIC/SWIFT code and get an instant structural and checksum verdict — no server, no upload, no account required. IBAN validation uses the full ISO 7064 MOD-97 algorithm and checks country-specific length rules for 80+ countries. BIC validation checks format and structure per ISO 9362. Your banking details never leave your browser.

このツールの使い方

1. Select IBAN or BIC/SWIFT mode using the toggle at the top of the tool.
2. Type or paste the code into the input field — spaces are stripped automatically.
3. Read the instant result: valid codes show a green breakdown with country, check digits, and BBAN; invalid codes show the exact error. Copy the formatted IBAN with one click.