Excel to JSON Upload a spreadsheet, edit data in a live table, and see JSON output update in real time. Supports .xlsx, .xls, and multiple sheets. Live Preview Multi-Sheet Inline Editing 100% Local

Excel to JSON Convert .xlsx & .xls to JSON ✨ New: Smart timestamp conversion — Convert timestamps in JSON with one click.

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1Upload a .xlsx or .xls file
2Select the sheet to convert
3Copy, beautify, or download the JSON output

        

        

          
          
        

        
      

    

  


  
  

    

      
      
      First row as keys
    

    

    

      
      
    

    

    

      
      
      Dot notation → nested
    

  








  

    
Excel to JSON — Best Practices

    

      

        
1

        
Clean Your Data First

        
Remove empty rows and columns before uploading. Ensure your headers are in the first row for the best JSON output structure.

      

      

        
2

        
Check Sheet Selection

        
If your workbook has multiple sheets, verify you've selected the correct one. Each sheet is converted independently.

      

      

        
3

        
Verify Data Types

        
Numbers, dates, and booleans are automatically detected. Complex date formats may need manual adjustment after conversion.

      

      

        
4

        
Large File Strategy

        
For large spreadsheets, use the table pagination to preview data. The full JSON output is available for download regardless of size.

      

    

  







  

    
Excel to JSON — Exclusive Features

    

      

        

          
        

        
Real-Time Table Preview

        
Upload your Excel file and see the data displayed in an editable table. Edit any cell and watch the JSON output update instantly.

      

      

        

          
        

        
Multi-Sheet Support

        
Excel files with multiple sheets? No problem. Select any sheet from the dropdown and convert it independently.

      

      

        

          
        

        
100% Private

        
Your Excel files never leave your browser. All processing happens locally using SheetJS — no server uploads, no tracking.

      

    

  







  

    
Excel to JSON — FAQ & Troubleshooting

    
    

      

        How do I convert Excel to JSON online?
        
Upload your .xlsx or .xls file, select the sheet you want to convert, preview the data in an editable table, and copy or download the JSON output. The entire process happens in your browser — no data is uploaded to any server.

      

      

        Can I convert Excel with multiple sheets to JSON?
        
Yes. When your Excel file contains multiple sheets, a sheet selector appears. You can switch between sheets and see the JSON output update in real time. Each sheet is converted independently.

      

      

        What is the difference between Excel to JSON and CSV to JSON?
        
Excel files (.xlsx/.xls) are binary formats that support multiple sheets, cell formatting, formulas, and merged cells. CSV is a plain text format limited to a single sheet. Excel to JSON preserves multi-sheet structure, while CSV to JSON works with raw text data.

      

      

        Is my Excel data safe when using this converter?
        
Yes, completely safe. All processing happens in your browser using the SheetJS library. Your Excel files are never uploaded to any server — they stay on your device the entire time.

      

      

        Does the tool support .xls files?
        
Yes. The converter supports both .xlsx (Excel 2007 and later) and .xls (Excel 97-2003) file formats.

      

      

        Can I edit the JSON output before downloading?
        
Yes. You can edit cells directly in the table preview, and the JSON output updates in real time. You can also click "Open in Editor" to jump to the JSON Editor for advanced editing.

      

      

        How are merged cells handled in Excel to JSON conversion?
        
SheetJS automatically fills merged cells by repeating the value from the top-left cell across the merged range. This ensures every row has the correct number of columns in the JSON output.

      

      

        Does the tool support password-protected Excel files?
        
No. Password-protected Excel files cannot be parsed. You will see an error message prompting you to remove the password protection first and try again.