IBAN Validator & Checker

Validate an International Bank Account Number against ISO 13616 (mod-97 checksum + per-country format), or compute the check digits for a country + BBAN. Runs entirely in your browser — your IBAN never leaves your device.

Mode

IBAN

Result

The IBAN is rearranged (first 4 chars moved to the end), letters replaced by digits (A=10 … Z=35), and the integer taken mod 97. A valid IBAN has remainder 1.