iban

Validates an International Bank Account Number (IBAN) for 77 countries.

Options

Option	Type	Default	Description
country	string	undefined	Restrict to a specific country code (e.g. "DE")
sepa	boolean | string	undefined	If true, restrict to SEPA countries; if a string, treated as a country code
message	string	locale default	Custom error message

Playground

Valid values

Value	Country
"DE89370400440532013000"	Germany
"GB29NWBK60161331926819"	United Kingdom
"FR7614508059009054924040816"	France

Invalid values

Value	Reason
"DE89370400440532013001"	Wrong mod-97 checksum
"XX89370400440532013000"	Unknown country code

Notes

• Empty string ("") always returns valid: true. Combine with notEmpty to require a value.
• Without country option, accepts IBANs from all 77 supported countries.
• With sepa: true, only accepts IBANs from the 36 SEPA member countries.