Before building Fake IBAN Generator, we checked two popular fake IBAN generators directly.
Test iban generator, but the checksum is a black box
Both 10015.io and fakeiban.org generate IBANs that "pass" mod-97 validation — that part checks out, we verified their claims are technically accurate. But neither page shows you how that check digit was actually computed. You get a finished IBAN and a claim that it's valid; if you want to understand or verify the math yourself, you're on your own.
Mod 97 iban checksum, shown step by step
This generator exposes the whole calculation for every result: the BBAN rearranged with the country code moved to the end, the letter-to-digit conversion (A=10 through Z=35, per ISO 7064), the resulting number's remainder mod 97, and the final check digits derived from it. We verified our implementation against the official IBAN example (GB82 WEST...) before shipping — the computed check digits matched exactly.
Random iban for testing, with no ambiguity about what it is
Neither competitor we checked shows an on-page warning that the output isn't a real bank account — worth flagging since a structurally valid-looking IBAN could be mistaken for genuine banking info by someone unfamiliar with what "passes checksum validation" actually means. This tool has a fixed warning banner at the top of the page: test data only, never submit for identity or payment verification.
