Excel → CSV

Converts the first sheet of an Excel file to CSV.

Excel to CSV converts the first sheet of an Excel file (.xlsx or .xls) into comma-separated values, right in your browser. It's handy when you need to feed spreadsheet data into scripts, databases, or APIs that expect plain CSV rather than a binary workbook. Powered by SheetJS, the conversion is instant and works without any upload or sign-up.

Common uses

  • Turning an exported .xlsx report into CSV for import into a database or data pipeline
  • Preparing spreadsheet data for command-line tools, scripts, or version control where plain text is preferred
  • Quickly extracting tabular data from a legacy .xls file shared by a colleague
  • Converting a single-sheet workbook into CSV for use with pandas, R, or other data tools
  • Sanity-checking spreadsheet contents as readable text before further processing

FAQ

Is my data sent to a server?

No. The conversion runs entirely in your browser using SheetJS, and your file is never uploaded or stored anywhere. Nothing leaves your device.

Which file formats are supported?

It accepts the formats SheetJS can parse, including modern .xlsx and older .xls workbooks. The file is read as a binary array buffer and parsed locally.

What happens if my workbook has multiple sheets?

Only the first sheet in the workbook is converted to CSV. Other sheets are ignored, so move the data you need to the first sheet before converting.

How are the CSV values delimited?

Values are separated by commas, following the standard CSV format produced by SheetJS. Fields containing commas, quotes, or line breaks are quoted automatically.

What if the file has no sheets?

If the workbook contains no sheets, the conversion fails with an error indicating that no sheets were found. Make sure your file has at least one populated sheet.

Related tools

  • CSV → HTML Table
  • CSV → JSON
  • CSV → Markdown Table
  • CSV → SQL Insert
  • CSV → XML
  • CSV → YAML
  • CSV Transpose
  • CSV ↔ TSV