EXCEL to CSV Converter

Transform your Excel workbooks (.xlsx, .xls) into clean CSV files. Fast, free, and processed entirely in your browser for maximum data security.

Drop Excel files here or click to upload

Supports .xlsx and .xls (Max 100MB)

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About Excel to CSV

Excel files are rich documents containing formulas, formatting, and multiple sheets. However, for data analysis, database imports, and software compatibility, a simple CSV (Comma-Separated Values) format is often required. CSV files contain raw data in a plain-text format, making them universally readable.

Our converter uses Client-Side Rendering (CSR). By using the SheetJS library, your browser reads the binary spreadsheet data and generates the text-based CSV locally. Your sensitive financial data or contact lists never touch our servers.

How to Convert Excel to CSV

  1. Upload: Drag your Excel (.xlsx or .xls) files into the drop zone or click to select them.
  2. Review: Check your files in the preview list. You can add more files to process them as a batch.
  3. Process: Click "CONVERT TO CSV". The browser will parse the first sheet of each workbook.
  4. Download: Your CSV files will be generated and downloaded instantly to your device.

Frequently Asked Questions

Which Excel sheet will be converted?

By default, this tool converts the first (active) sheet of your Excel workbook into a CSV file.

Is my data secure?

Yes. The entire conversion process happens in your browser's memory. No spreadsheet data is uploaded to any server or stored anywhere.

Does it support .xls (older Excel)?

Yes, the tool supports both the modern XML-based .xlsx format and the older binary .xls format.

Will my formulas be preserved?

CSV is a plain-text format. This tool converts the *results* of your formulas into text values. The formulas themselves are not stored in the CSV.