Processed locally — your file never leaves your device
Excel to JSON Converter
Convert Excel .xlsx and .xls workbooks to JSON in your browser, choosing between an array of objects or an array of arrays.
Excel
Drop a spreadsheet or data file hereor click to choose a file from your deviceNothing is uploaded — everything happens on your device.
How it works
- Select or drop an .xlsx or .xls workbook.
- Pick the sheet you want if the workbook has several.
- Choose whether you want an array of objects or an array of arrays.
- Download the resulting .json file.
Frequently asked questions
- Is my workbook uploaded to a server?
- No. The file is read and converted by your browser, on your device. This matters for spreadsheets in particular, which routinely hold payroll, customer lists or financial figures.
- Which sheet does it convert?
- The first one by default, and you can switch sheets before converting — each sheet becomes its own JSON document rather than being merged.
- What shape is the JSON?
- Your choice. An array of objects uses the header row as keys, which is what most APIs expect; an array of arrays preserves the raw grid including a header row.
- How are dates and numbers handled?
- Numbers stay numbers. Dates are read as the workbook stores them and written in a readable form rather than as Excel's internal serial number.