Validate an ISIN securities identifier with its Luhn-based checksum online, in your browser.
Validate an International Securities Identification Number (ISIN): a 2-letter country code, 9 alphanumeric characters and a check digit. The tool verifies the format and the Luhn-on-expanded-digits checksum.
A globally unique 12-character code for a stock, bond or fund, e.g. US0378331005 for Apple.
Letters are expanded to numbers (A=10…Z=35), then a Luhn checksum is applied to the resulting digit string.