Get your data as JSON ready for any API.
Drag & drop your Excel files here or click to browse
XLSX, XLS, CSV - Max 1 files
100% local processing in your browser. Your file stays on your device.
Headers become field names.
Each sheet becomes an array in the JSON.
JSON is formatted for readability.
Unlike many online converters, this Excel tool is completely free. No sign-up, no email required, no daily limit. Process as many files as you like, instantly.
Your Excel file is processed directly in your browser using modern JavaScript libraries (ExcelJS, SheetJS). No data is sent to a remote server — your contracts, financial data and personal information stay strictly on your device.
The tool works on Chrome, Firefox, Edge, Safari, on Windows, Mac, Linux computers, as well as on tablet and mobile. No installation, no extension required — just open the page and start processing.