IBAN Validator & Checker Online — Free & Private

A free edge API by formatho.com, privacy-first developer tools.

Open the full browser tool →

Free, no signup, runs entirely in your browser — your data never leaves your device.

🔓 Free 🔒 Zero tracking 🚫 No data collection ⚡ Edge-fast

Usage

curl "https://iban-validator-formatho.filesformatho.workers.dev/api?iban=GB82WEST12345698765432"
curl "https://iban-validator-formatho.filesformatho.workers.dev/api?iban=DE89 3704 0044 0532 0130 00"

Full parameter reference and live response: /api endpoint.

What gets checked?

The validator runs the full ISO 13616 gauntlet: country-code structure, per-country IBAN length from the SWIFT registry (60+ countries), allowed character set, and the mod-97 checksum computed over the rearranged, digit-expanded IBAN. You also get the electronic (no spaces) and paper (4-character groups) formats back.

Privacy-first: every request is processed in-memory on Cloudflare's edge and answered immediately. No logs, no analytics, no cookies, no data collection — your IBAN never leaves the edge node that served you. See the Formatho privacy philosophy.

Full browser tool

Prefer a UI? Use the complete client-side version — validation happens right in your browser: IBAN Validator on formatho.com.

All Formatho edge APIs

Browse every free Formatho Worker tool on the Formatho Tools index.