IBAN Validator
Check whether an IBAN is valid — country length, format and the mod-97 check digits — and see it formatted in groups of four.
For information and education only — not financial advice. Results are estimates based on the numbers you enter; check important decisions with a qualified professional.
How to use
- 1Paste or type the IBAN (spaces are fine).
- 2See whether it's valid, its country, check digits and the formatted version.
How it's calculated
ISO 13616: move the first four characters to the end, turn letters into numbers (A = 10 … Z = 35), and the result mod 97 must equal 1. The length must match the country.
Frequently asked questions
Does a valid IBAN mean the account exists?
No. The check digits catch typos, but only the bank can confirm the account is real and open.
Is it safe to enter an IBAN here?
The check runs entirely in your browser and nothing is sent anywhere.
How long is an IBAN?
It depends on the country — from 15 characters in Norway to 32 in Saint Lucia. Germany uses 22, France 27 and the UK 22.