Paste it below. The check runs in your browser using the official ISO 13616 mod-97 algorithm — your bank details never leave this page.
An IBAN carries its own proof. The first four characters move to the end, every letter becomes a number (A=10 … Z=35), and the resulting long number is divided by 97. A genuine IBAN always leaves a remainder of exactly 1. That's why a single mistyped digit is caught immediately — and why this page needs no server to tell you.
There is no single IBAN length: Norway uses 15 characters, Germany 22, France 27, Poland 28. The checker knows every country's length, and each country has its own page showing what each part of its IBAN means. IBAN format by country →
Your IBAN is never sent anywhere: no request carries it, nothing is stored, no account is needed. The validation is a few lines of arithmetic running on your machine — disconnect from the internet and this page still works. The site counts anonymous page views, and that is all.
Snip2Field puts it where the typing actually happens: press a hotkey, drag a box over the IBAN on any invoice or PDF, and it reads the field, runs this exact checksum, and copies it — ready to paste into your books or a transfer form. Fully offline, like this page.
See Snip2FieldThree things: the country code must exist, the length must match that country (Germany 22, France 27, Netherlands 18, and so on), and the mod-97 checksum must come out to 1. This page checks all three.
No. The checksum proves the number was typed correctly — not that anyone holds that account. Only the receiving bank knows whether an account is real, which is what the EU's Verification of Payee check does at transfer time.
Yes. The check is arithmetic running in your browser; nothing is sent anywhere and nothing is stored. You can turn off your internet connection and it still works.
Most often the copy picked up a stray character, or the source itself is wrong. If the checksum fails, one digit is usually wrong or two are transposed — the error message above tells you which check failed.
Not by copying — a scanned invoice is an image, so there's no text to select. You'd retype it, or use a tool like Snip2Field that reads the region on screen and verifies the checksum for you.