Convert EXCEL to CSV, Free
Upload your EXCEL file and get a CSV in seconds. No account, no watermark.
How to convert EXCEL to CSV
Excel files (XLSX or XLS) store spreadsheet data in a binary or compressed XML format that requires Excel or a compatible app to open. CSV (comma-separated values) is a plain text format that any programming language, database, or tool can read without special libraries. Converting your Excel file to CSV is the standard step before importing data into SQL databases, Python scripts, R analysis, or APIs.
BoltConverter converts your Excel file on our servers and extracts the active sheet as a CSV. The header row and all data rows are preserved. After conversion, both files are deleted from the server immediately.
Upload your Excel file
Click the upload area or drag your XLSX or XLS file onto the page.
The active sheet is extracted
BoltConverter reads the first sheet of your workbook and converts it to a comma-separated text file.
Download the CSV
Click Download to save the CSV file. You can then open it in any text editor, spreadsheet app, or import it directly into a database.
Frequently asked questions
Which sheet gets converted if my workbook has multiple sheets?
BoltConverter converts the first sheet in the workbook. If you need a different sheet, move it to the first position in Excel before uploading.
Will formulas be preserved in the CSV?
No. CSV stores cell values only, not formulas. The output CSV contains the calculated results of any formulas in your spreadsheet.
Will formatting like bold text and colors be kept?
No. CSV is plain text and cannot store formatting. Only the raw cell values are included in the output.
Are my files stored on the server?
No. Both the uploaded Excel file and the resulting CSV are deleted from our servers immediately after you download the result.
What is the maximum file size?
Excel files up to 100 MB are supported. Very large spreadsheets with many rows may take slightly longer to process.