IBAN Validator
Validate IBAN account numbers
π 100% client-side β your data never leaves this pageIBAN Input
Validation Result
Validation result will appear here
π 100% client-side
About this tool
Validate International Bank Account Numbers (IBAN) with correct checksum logic and instant per-line feedback. This tool helps developers, finance teams, and operations staff quickly identify malformed account identifiers before payment processing, imports, or API submission. All checks run directly in your browser for private and fast verification.
Frequently Asked Questions
How is IBAN validity checked?
The validator applies the official mod-97 checksum process after rearranging and expanding the IBAN string.
Can I validate multiple IBANs at once?
Yes. Paste one IBAN per line and each line is checked independently.
Does valid IBAN mean account is active?
No. Validity confirms format and checksum only, not whether the bank account is currently active.