XLS to JSONExcel 97-2003 (XLS)

Legacy binary Excel format.

Binary BIFF-based format used by Excel 97 through 2003. TabularJS decodes BIFF records and PTG tokens to reconstruct formulas and data.

Feature support

Example

import tabularjs from 'tabularjs';

const result = await tabularjs('legacy-report.xls');
console.log(result.worksheets[0].data);

Why TabularJS for Excel 97-2003 (XLS)?

• No external parser dependencies — faster installs, smaller bundles.
• Works identically in Node.js and modern browsers.
• Output is shape-compatible with Jspreadsheet — render parsed data in a live workbook with one call.