Data

Excel to JSON Converter

Convert Excel sheets to JSON without uploading workbooks. Processing stays on your device.

How to Use

  1. Upload an Excel file.
  2. Pick a sheet.
  3. Download JSON for the rows.

Key Features & Privacy Advantage

  • All processing happens locally in your browser. Your files are never uploaded to a server.
  • SheetJS in-browser parse.
  • Sheet picker.
  • JSON download.

Technical Breakdown

SheetJS reads workbook structures in WASM/JS. First-row headers become object keys. Formulas may appear as cached values depending on the file.

Frequently Asked Questions

Are workbooks uploaded?

No. All processing happens locally in your browser. Your files are never uploaded to a server.

Multiple sheets?

Choose which sheet to export.

Password files?

Encrypted workbooks are not supported in this build.

XLS vs XLSX?

Both common formats are accepted when SheetJS can parse them.