Paste an IBAN, US routing number, or UK sort code. Auto-detected. Instantly validated. Fully explained.
Click any example to see a live validation
Built for accuracy, privacy, and speed
All validation runs in your browser. No data is sent to any server. Ever.
Real-time validation as you type, with smart debouncing for a smooth experience.
IBAN validation covers every country in the IBAN registry, plus US and UK formats.
Paste any bank number. We detect whether it's an IBAN, routing number, or sort code.
Color-coded segments show you exactly what each part of the number means.
Not just "invalid" — we tell you what's wrong and suggest how to fix it.