Export Excel to CSV without Excel (free, private)

CSV is the universal interchange format: CRMs, analytics tools, databases and scripts all take it. But making one usually means opening Excel and clicking through Save As dialogs — on a machine that has Excel.

ConvertFlow reads your XLSX (or legacy XLS) with SheetJS compiled to WebAssembly, exports the first worksheet to clean CSV, and hands you the file. Nothing is uploaded — useful for financial data, customer lists and anything confidential.

Multiple sheets? The first sheet is exported; rename sheets so the one you need comes first.

Convert XLSX → CSV