What Excel formats are supported?

Both .xlsx and .xls files are supported. You can also select which sheet to convert if the workbook contains multiple sheets.

How is the JSON structured?

Each row becomes a JSON object. The column headers become keys, and every value is kept as a string. Nested objects are flattened.

No. The file is read and converted entirely in your browser using the SheetJS library. Nothing is uploaded.

Spreadsheet Tools

Upload an Excel file to convert it to JSON. Choose a sheet, preview, and download — all in your browser.

Upload an Excel file to convert it to JSON. Files are processed in your browser and are not uploaded.

Click to upload .xlsx or .xls

Files are processed in your browser and are not uploaded to any server.

What Excel formats are supported?: Both .xlsx and .xls files are supported. You can also select which sheet to convert if the workbook contains multiple sheets.
How is the JSON structured?: Each row becomes a JSON object. The column headers become keys, and every value is kept as a string. Nested objects are flattened.
Is my file uploaded to a server?: No. The file is read and converted entirely in your browser using the SheetJS library. Nothing is uploaded.