Convert Excel to CSV
Export each sheet of an .xlsx workbook to a UTF-8 CSV file that opens correctly everywhere. Dates, numbers and text are kept as they are.
Free forever · Runs on your device · 0 bytes uploaded
Speed depends on your device; big files on phones take longer. Slow or not working? Report it on GitHub
How to excel to CSV
- Add one .xlsx file (from Excel or Google Sheets).
- Click “Convert to CSV”.
- Download the CSV, or a ZIP with one CSV per sheet.
Also good for
- convert XLSX to CSV
- export Excel sheet as CSV
- Google Sheets to CSV
- Excel to CSV with all sheets
- XLSX to CSV free
Private by design — and you can check
Your files are never uploaded, because there is nowhere to upload them to.
- No upload step existsFiles are read and written inside this browser tab. There is no server that could receive them.
- The browser enforces itThis page’s Content Security Policy only allows connections back to this site, which serves nothing but the app itself.
- See for yourselfOpen developer tools, watch the Network tab and run a job: no request carries your document.
- Open sourceEvery line is on GitHub, built on qpdf, pdf.js & pdf-lib.
Frequently asked questions
Are my files uploaded anywhere?
No. Fizzdoc does the work inside your browser tab, using open-source engines compiled to WebAssembly and JavaScript. Your file is read from your device, processed locally, and the result is saved straight back to your device. You can check this yourself: open your browser’s developer tools, go to the Network tab, and run a job — no request carries your file.
What happens to formulas?
CSV stores values only, so each cell’s last calculated value is exported — the same thing Excel does.
Are non-English characters kept?
Yes. The CSV is UTF-8 with a byte-order mark, so Excel, Google Sheets and other apps read accents and non-Latin scripts correctly.
Is Fizzdoc free?
Yes, and it stays free: no sign-up, no watermark, no daily limit and no premium tier. Fizzdoc is open source under the Apache-2.0 license, so anyone can run their own copy.
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