What does this tool do?
Upload an Excel file, or paste copied spreadsheet cells, to convert them into JSON. Everything runs locally using JavaScript in your browser — nothing you paste or upload is ever sent to a server.
How to use this tool
- Upload your file, or paste your excel file or pasted cells into the left-hand box.
- Click Convert to JSON.
- Copy the json output from the right-hand box.
Frequently asked questions
Which file formats are supported?
Standard .xlsx and .xls spreadsheet files. If you upload a file, only the first sheet is converted.
Can I use this without uploading a file?
Yes — copy a range of cells from Excel or Google Sheets and paste them directly into the text box instead; the tool treats pasted spreadsheet data as tab-separated values.
Is my spreadsheet uploaded to a server?
No — the file is read and parsed entirely in your browser using JavaScript; it's never uploaded anywhere.