XLSX converter
Pick what to do with a XLSX file. Everything runs in your browser, nothing is uploaded.
Convert XLSX files free and in your browser. Pick a target format or a tool below, drop your file in, and download the result. Nothing is uploaded, so your files stay on your device.
Common XLSX conversions include CSV, TSV, JSON, among others.
About XLSX
XLSX is the modern Excel workbook format. It holds multiple sheets, formulas, and formatting.
Questions
Is the XLSX converter free?
Yes, it is free with no sign-up and no watermark. There is no cap on how many files you can convert, and nothing to install.
Do my files get uploaded to a server?
No. The conversion runs entirely in your browser using code that loads onto your device, so the file is read, converted, and downloaded locally. It never reaches us or anyone else.
Which format should I convert my XLSX to?
It depends on what you need. For wide compatibility choose a mainstream format; for the smallest file choose a modern, efficient one. Each conversion page explains the trade-off.