Convert Excel spreadsheets (XLSX, XLS, ODS) to CSV in your browser, with per-sheet selection and delimiter options.
Your spreadsheet is parsed entirely on your device and never uploaded. The downloaded CSV includes a UTF-8 byte-order mark so it reopens correctly in Excel.
Convert Excel spreadsheets (XLSX, XLS, ODS) to CSV in your browser, with per-sheet selection and delimiter options. This Excel to CSV is part of our free developer tools collection on freetoolstouse. It runs entirely in your browser, so your files and inputs stay on your device unless the tool explicitly performs a network check (for example DNS or SSL lookups). There is no signup, no watermark, and no usage cap. Use it whenever you need a fast, accurate result without installing software.
