IBAN Validator
Paste or type any International Bank Account Number (IBAN) and instantly check whether it is valid. The tool applies the ISO 13616 mod-97 check-digit algorithm used by banks worldwide, so you can catch typos before initiating a wire transfer. It recognizes IBANs from over 70 countries and automatically handles spaces, lowercase letters, and common formatting variations.
Once validated, the tool breaks the IBAN into its components: the two-letter country code, the two check digits, and the Basic Bank Account Number (BBAN) that follows. It also displays the formatted version with standard four-character grouping for easy reading and comparison.
Everything runs in your browser — no data is sent to any server, and no account or signup is required.
By The Paper Room Editorial Team — Calculator Tools
Frequently asked questions
Does this tool verify that the bank account exists?▼
No. It validates the IBAN structure and check digits according to the ISO 13616 standard. A valid IBAN format does not guarantee that the account exists or is active — only the receiving bank can confirm that.
Which countries are supported?▼
The tool supports IBAN formats for over 70 countries, including all EU/EEA members, the UK, Switzerland, Turkey, Saudi Arabia, the UAE, and many others. If your country uses the IBAN system, it is almost certainly covered.
How does the mod-97 check work?▼
The IBAN is rearranged by moving the first four characters to the end, then every letter is replaced by its numeric equivalent (A=10, B=11, ..., Z=35). The resulting number is divided by 97 — if the remainder is 1, the check digits are correct.
Is my IBAN sent to a server?▼
No. All validation runs locally in your browser using JavaScript. Your IBAN never leaves your device.