Private by design

Spreadsheet Converter

Convert Excel XLSX, XLS, ODS and CSV spreadsheets to CSV, XLSX, JSON, ODS or PDF — XLSX/CSV/JSON run entirely in your browser.

Options

Your history 0 saved

Stored only in this browser (last 50 jobs). Nobody else can see it.
Work in progress

Your files are still being processed.

Side-by-side comparison
Original
Result

How to use

  1. Add one or more XLSX, XLS, ODS, CSV and JSON spreadsheets — drag and drop, click to browse, or paste.
  2. Adjust the options, or keep the recommended defaults.
  3. Press “Convert” and download each result, or everything at once as a ZIP.

Formats & privacy

Input: XLSX, XLS, ODS, CSV and JSON

Output: CSV, XLSX, JSON, ODS and PDF

Files are processed on your device whenever your browser can do the job. A file only reaches our server when it is too large or needs a codec the browser lacks. Read the privacy details.

Frequently asked questions

Is Spreadsheet Converter free?

Yes. Spreadsheet Converter is free to use, with no sign-up, no watermark and no daily limit.

Are my files uploaded?

Usually not. Processing happens on your device in the browser. Only when your browser cannot handle a file (for example, a very large one) is it sent to our server, processed, and deleted automatically within 30 minutes.

Which formats are supported?

Input: XLSX, XLS, ODS, CSV and JSON. Output: CSV, XLSX, JSON, ODS and PDF.

Is there a file size limit?

Files up to 50 MB are processed on your device. Larger files are handled by our server when it is available.

Can I process several files at once?

Yes. Add as many files as you like; they are processed in parallel and you can download them all as a single ZIP.