Excel to JSON – Convert Excel to JSON Online Free

Use our free excel to json converter to turn your spreadsheet into a JSON file right in your browser. No signup, no software to install, no watermark — upload your file, pick the worksheet, and download the result in seconds. Your file never leaves your device because the whole conversion happens locally on this page.

Drop your Excel file here
or browse files — .xlsx, .xls, .csv

🔒 100% free & private — your file is converted in your browser and never uploaded to any server.

How to convert Excel to JSON file

  1. Upload your Excel file — Drag your file into the box above or click to browse. We accept .xlsx, .xls, .csv files.
  2. Choose the worksheet — If your file has several worksheets, pick the one to convert. A preview of your data appears instantly.
  3. Convert and download — Click "Convert to JSON" — your JSON file downloads immediately, ready to use.

Why convert Excel to JSON?

JSON is the data format of the web — turning a spreadsheet into JSON takes seconds instead of hand-coding it.

  • Hand your spreadsheet to developers as clean JSON for web apps and APIs.
  • Convert product lists, translations or config tables into a format code can read directly.
  • Bridge the gap between business spreadsheets and software without manual reformatting.

Which formats can you convert from?

XLSX to JSON

Upload a modern .xlsx workbook — the most common Excel format — and get your JSON in one click.

XLS to JSON

Have an older .xls file? It converts just as easily; legacy Excel formats are fully supported.

CSV to JSON

Comma-separated .csv files work too, so data exported from databases and apps converts directly.

Will my spreadsheet layout stay intact?

Every row becomes a JSON object keyed by your header row, so the structure mirrors your table exactly. Cell formatting is not included — JSON carries data, not styling.

Is it safe to convert Excel files online?

Yes. Unlike many online converters, this tool does not upload your file anywhere — the conversion runs entirely in your browser, so sensitive business data stays on your own device. (JSON: JSON.)

Tips for a perfect excel to json conversion

  • The first row becomes the field names — make sure your header row is clean and descriptive.
  • Empty cells become empty strings in the JSON output.
  • Only the selected worksheet is converted; convert each sheet separately for multi-sheet files.

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Frequently asked questions

Is this Excel to JSON converter really free?

Yes. The converter is 100% free with no signup, no watermarks, and no limit on the number of files you convert.

Are my files uploaded to a server?

Your file is converted entirely in your browser with JavaScript. Nothing is uploaded to any server, so your data never leaves your device.

Which Excel formats can I convert from?

You can upload .xlsx, .xls, .csv files. The active worksheet is converted into a clean JSON file.

Will my data stay intact?

Yes. All cell values from the worksheet are carried over. Cell styling such as colours and fonts is not part of JSON file formats, so only the data itself is converted.

Does it work on mobile?

Yes. The converter runs in any modern browser on desktop, tablet and mobile — no app or software installation needed.