Convert Excel Spreadsheets to CSV Format Online
Excel XLSX files are the standard for business spreadsheets, but many tools โ databases, ETL pipelines, Python scripts, data science notebooks โ work exclusively with CSV. This converter reads your Excel file entirely in the browser using SheetJS, so no data is ever transmitted to any server.
Multi-sheet workbooks are fully supported: each sheet is listed as a tab so you can pick exactly which one to export. You can also choose your output delimiter โ comma, tab, semicolon, or pipe โ to match the expected format of your destination system.
Common Use Cases
- Database imports โ MySQL LOAD DATA INFILE, PostgreSQL COPY, and SQLite .import all expect CSV.
- Python/Pandas โ pd.read_csv() is simpler than pd.read_excel() and has fewer dependencies.
- Google Sheets import โ CSV import is faster and more reliable than XLSX for large files.
- ETL pipelines โ Apache Airflow, dbt, and Fivetran work best with plain CSV sources.
- Legacy systems โ Many older ERP and CRM platforms accept CSV but not XLSX.
Multi-Sheet Support
When you upload a workbook with multiple sheets, every sheet is listed. Click any sheet tab to preview its data and regenerate the CSV output. This is especially useful for financial models, project trackers, and report workbooks that store data across many sheets.