Private browser file tool
Convert XLSX to CSV
Export one worksheet from an XLSX workbook as injection-safe CSV locally in your browser.
Your workbook stays on this device. File bytes, cell values and converted CSV are not sent to a FigureNest conversion server.
Choose a file
Selected files are handled in memory by FigureNest local-processing tools. This shared foundation contains no upload path.
Up to 75 MB, 20 worksheets, 100,000 rows, 1,000 columns and 250,000 populated-range cells per exported sheet. Suspicious ZIP/XLSX packages are rejected locally.