Convert Excel to CSV
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When to convert Excel to CSV
CSV is the universal data format — every programming language, database, and analytics tool can read it. Converting Excel to CSV is common when importing data into databases, uploading to web applications, feeding data into scripts, or sharing with systems that don't support Excel's proprietary format. CSV strips away formatting, formulas, and charts, leaving just the raw data.
What to know about the conversion
The conversion extracts data from the first sheet of your Excel file and outputs it as comma-separated values. Formulas are resolved to their calculated values. Formatting, charts, images, and multiple sheets are not included — CSV is a flat text format. If your workbook has multiple sheets, only the first one is converted. OnlyFiles uses SheetJS in your browser for the conversion, so your spreadsheet data never leaves your device.
When to use this
- Export Excel data for import into a database or CRM
- Convert a spreadsheet to CSV for use in a Python or R script
- Share tabular data with a system that only accepts CSV format
Frequently asked questions
How do I convert Excel to CSV?
Drop your .xlsx file at onlyfiles.org/convert/excel-to-csv. The CSV downloads instantly. Conversion runs in your browser — your data stays on your device.
What happens to formulas and formatting?
Formulas are resolved to their calculated values. Formatting, charts, and images are stripped out — CSV is plain text data only.
Which sheet gets converted?
The first sheet in your Excel workbook is converted to CSV. If you need a different sheet, move it to the first position in Excel before converting.