XLSX to CSV Converter - Free, Instant, In Your Browser
Upload a .xlsx file to convert its first sheet into a plain comma-separated .csv file.
How to use XLSX → CSV
- 1Drag and drop your file, or click to select it.
- 2Click Convert to run XLSX → CSV.
- 3Download the result - your file never leaves your device.
Drag & drop a file here, or click to browse
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
What if my workbook has multiple sheets?
Only the first (leftmost) worksheet is converted - CSV has no way to represent multiple sheets, so this matches how most "convert to CSV" tools behave.
Is my file uploaded to a server?
Yes, briefly - the conversion runs on our server since browsers can't generate real Word or Excel files natively. The file is processed and deleted immediately after - it's never stored long-term.