Is Excel to CSV converter free?

Yes, completely free with no signup required.

Your files never leave your browser. All processing is done locally using the SheetJS library (xlsx). Nothing is uploaded to any server.

Which Excel formats are supported?

XLSX and XLS files are supported. The tool reads the workbook entirely in your browser using SheetJS.

Can I convert a specific sheet?

Yes. After uploading your file, a dropdown will list all available sheets. Select the one you want to convert before clicking the convert button.

Will formulas be exported to CSV?

CSV stores values only, not formulas. The tool exports the computed values from each cell as they appear in the spreadsheet.

What is the file size limit?

There is no hard limit — the file is processed in your browser's memory. Very large files (over 50 MB) may be slow depending on your device.

Convert Excel to CSV Online Free

Convert any Excel XLSX or XLS file to a CSV file instantly in your browser. Free, no signup, your files never leave your device.

🔒 Your file never leaves your browser. All processing is done locally.

Drop an XLSX or XLS file here or click to browse

Single file · XLSX / XLS

How to Convert Excel to CSV

1
Upload your Excel file
Click the upload zone or drag and drop an XLSX or XLS file. Your file stays on your device — nothing is sent to a server.
2
Select the sheet to export
A dropdown will show all sheets in the workbook. Pick the sheet you want to convert. The first sheet is selected by default.
3
Download the CSV
Click "Convert to CSV". The file downloads instantly as a .csv file named after your original file and selected sheet.

CSV (Comma-Separated Values) is a plain-text format that stores tabular data as rows of values separated by commas. It is universally supported by databases, data science tools, programming languages, and any application that deals with tabular data. Excel XLSX files, while powerful, are a proprietary binary format that not every tool can read — exporting to CSV makes your data portable and interoperable.

When to convert Excel to CSV: Use this tool when you need to import spreadsheet data into a database, process rows in Python or R, share data with a non-Excel user, or feed records into a web application or API. CSV is also ideal for version-controlling tabular data in git, since text-based files produce readable diffs.

What is preserved: Cell values (text, numbers, dates formatted as text) are preserved. Formulas are exported as their computed values. Formatting, charts, images, and multiple sheets are not carried over — CSV stores a single flat table. If your workbook has multiple sheets, use the sheet selector to pick which one to export.

How this tool works: Your file is read entirely in the browser using SheetJS (xlsx), a battle-tested open-source library. No data is sent to any server. The resulting CSV is generated client-side and offered as an immediate download.

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