XLSX to CSV Converter
Convert XLSX files to CSV free — instantly, with no sign-up, no watermark and no upload.
Zero server uploads. The XLSX to CSV conversion happens inside your browser, so your file never leaves your device and nothing is stored by us.
Drop your XLSX file here
or click to browse — accepts .xlsx,.xls
Instant and free
No account, no watermark and no file size limit — as fast as your device allows.
Completely private
Everything runs in your browser, so your files are never uploaded anywhere.
Works everywhere
Chrome, Edge, Safari and Firefox on Windows, macOS, Linux, Android and iOS.
Why convert XLSX to CSV?
Most databases, analytics tools and import forms expect plain CSV rather than an Excel workbook. Converting strips the styling and leaves clean rows and columns any system can read.
Are my XLSX files uploaded anywhere?
No. The conversion runs inside your browser using your own device's processing power, so the file never leaves your computer or phone and nothing is stored on a server.
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