Convert XLSX to CSV

Transform your xlsx file format into CSV format. Free, private, and browser-based.

How it works

  1. Upload XLSX Files — Drag and drop your XLSX files into the converter, or click to browse.
  2. Convert to CSV — The converter processes your files to CSV format entirely in your browser. No files are uploaded to any server — your privacy is guaranteed.
  3. Download Results — Download your converted CSV files instantly. For multiple files, download individually or as a ZIP archive.

Why convert XLSX to CSV

  • Upload to websites and platforms that require or prefer CSV format
  • CSV is widely supported across image editors, media players, and operating systems
  • Free, instant conversion with no file size limits — runs entirely in your browser
  • No software installation needed — convert directly from any web browser

FAQ

Is XLSX to CSV conversion free?
Yes, Fileza.io converts XLSX to CSV completely free with no limits on file size or number of conversions. No hidden fees, no watermarks, and no account required.

Will I lose quality converting XLSX to CSV?
Quality depends on your chosen settings. Higher quality settings produce better results with slightly larger files. The default settings produce excellent output for most uses.

Is it safe to convert XLSX to CSV online?
Absolutely. Unlike most online converters, Fileza.io processes your files entirely in your browser using WebAssembly. Your XLSX files are never uploaded to any server — the conversion runs on your own device, keeping your files 100% private.

Can I convert multiple XLSX files to CSV at once?
Yes, Fileza.io supports batch conversion. Drag and drop multiple XLSX files at once and they will all be converted to CSV simultaneously. Download them individually or as a ZIP archive.

Does XLSX to CSV conversion work on mobile?
Yes, the converter works on any device with a modern web browser — iPhones, iPads, Android phones, and tablets. No app installation required.

Will the converted CSV files be smaller or larger than XLSX?
File sizes depend on content and quality settings. XLSX files are typically varies, while CSV files are varies.

How long does XLSX to CSV conversion take?
Most conversions complete in seconds. The exact time depends on file size and your device performance. Since processing happens locally in your browser, faster devices convert more quickly.