XLSX to CSV Converter

How to convert XLSX to CSV

  1. Drop or select a .xlsx file(s).
  2. The tool convert XLSX to CSV locally using your browser — no server upload.
  3. Download the converted .csv file instantly.

Why convert locally?

Your .xlsx files are processed entirely in browser memory. Nothing is sent to a server, stored in a database, or retained after you close the tab. This makes local conversion ideal for sensitive data, proprietary configs, and private media.

Frequently asked questions

Is this XLSX to CSV converter free?

Yes. Every tool on convert.logicapplabs.com is free to use with no account required.

Are my files uploaded to a server?

No. All conversions run 100% client-side in your browser. Your files never leave your device.

What file size limits apply?

Limits depend on your browser and device memory. For very large files or batch jobs, consider ConvertLogic Pro for offline batch processing.

Related tools