How to Convert Excel (XLSX) to CSV Online
Learn how to convert Excel spreadsheets to CSV format online. Free, fast conversion for data analysis and import.
CSV (Comma-Separated Values) is the universal format for data exchange. Converting Excel XLSX to CSV makes your data compatible with databases, Python pandas, R, and countless other tools.
Upload your XLSX file to ConvertAll, select CSV as the output format, and download. The first sheet is converted by default. UTF-8 encoding ensures international characters are preserved.
CSV files are plain text — smaller, faster to process, and compatible everywhere Excel files aren't supported.
Frequently Asked Questions
CSV is a single-sheet format. ConvertAll exports the first worksheet. For multiple sheets, convert each separately or use JSON output.