Add your XLSX file, click Convert to CSV, and download the CSV result. The whole process happens in your browser and takes just a few seconds.

Yes. This XLSX to CSV converter is completely free with no sign-up, no watermarks and no limit on the number of files you can convert.

No. Conversion runs entirely on your device using your browser, so your files never leave your computer or phone.

No. CSV is a lossless format, so the conversion preserves the full quality of your original XLSX.

Yes. Add as many XLSX files as you like and convert them in a single batch, then download each CSV result.