Excel to JSON

0 uploads — runs entirely in your browser, works offline

Drag files here, or .

Convert each spreadsheet's first sheet to JSON — on your device, nothing uploaded.

Excel to JSON — spreadsheets to JSON

Convert an Excel file's first sheet to a JSON array of objects. It runs entirely in your browser (0 uploads, works offline).

How to use it

  1. Add your .xlsx files.
  2. Convert them.
  3. Download the JSON.

FAQ

How do I convert Excel to JSON for free?

Add the spreadsheet and this page turns the first sheet into a JSON array, using the header row as keys — on your device with no upload.

Is my spreadsheet uploaded anywhere?

No. Conversion runs entirely in your browser and nothing is transmitted or stored, which you can verify by turning off your Wi-Fi.

What does the JSON look like?

An array of objects, one per row, with the header cells as property names — ideal for feeding an API or a script.

Which sheet is used?

The first sheet of the workbook.

Limits

Uses the first sheet and its header row; merged cells and multiple sheets need pre-processing.

Related

The Excel-to-CSV tool outputs CSV; the JSON formatter tidies the result.

Bookmark this page (Ctrl+D, or ⌘D on Mac) or install the app — it works offline the next time you need it.