Excel / Spreadsheet Viewer & Converter

Open .xlsx / .xls / .ods / .csv, view every sheet, and export to JSON or CSV — nothing uploaded.

Open .xlsx / .xls / .ods / .csv, view every sheet, and export to JSON or CSV — nothing uploaded. Free and 100% private — runs entirely in your browser, nothing is ever uploaded.

About Excel / Spreadsheet Viewer & Converter

Excel / Spreadsheet Viewer & Converter is a free, browser-based developer utility that lets you open .xlsx / .xls / .ods / .csv, view every sheet, and export to JSON or CSV — nothing uploaded. Because it runs entirely on your device, there’s nothing to install, no account to create, and your data is never uploaded to a server.

How to use Excel / Spreadsheet Viewer & Converter

  1. Open Excel / Spreadsheet Viewer & Converter — it loads in any modern browser, with no sign-up.
  2. Paste or type your input.
  3. Get the result instantly, processed locally on your device.
  4. Copy or download the output — what you entered is never sent anywhere.

Frequently asked questions

Is Excel / Spreadsheet Viewer & Converter free?
Yes — Excel / Spreadsheet Viewer & Converter is completely free, with no account, sign-up or usage limits.
Is my data private?
Yes. Excel / Spreadsheet Viewer & Converter runs 100% in your browser, so your files and text are processed on your own device and never uploaded.
Do I need to install anything?
No — Excel / Spreadsheet Viewer & Converter works in any modern desktop or mobile browser with nothing to download.