Free online Excel to CSV converter

Convert XLSX to CSV Online

Convert Excel (.xlsx or .xls) files to CSV in your browser. Preview worksheets, choose CSV settings, and download without uploading your workbook.

No file upload Multiple worksheets Free, no signup

Excel to CSV

Convert your Excel file

No file upload

Drag your Excel file here

XLSX or XLS · Up to 10 MB

See how the conversion works.

How can I convert XLSX to CSV online?

Choose an Excel (.xlsx or .xls) file, preview your sheets, and select the CSV options you need. Click Convert to CSV to download the result. If your file has several visible sheets, you’ll get a ZIP containing a CSV for each one. Your Excel file stays on your device.

How it works

How to Convert XLSX to CSV

Choose your Excel file

Choose a .xlsx or .xls file, or drag it into the converter. Your file stays in your browser.

Convert Excel data to CSV

Preview your sheets, choose a column separator and text encoding, and decide whether to include the first row.

Download your CSV file

Click Convert to CSV and download your file. If your workbook has several visible sheets, you’ll get a ZIP with one CSV per sheet.

See the output

XLSX to CSV Example

Here’s what happens when you convert a small Excel sheet with two products into CSV.

Excel worksheet: Products

ID	Product	Price
A001	Keyboard	49.99
A002	Mouse	25.00

CSV output (comma, plain UTF-8)

ID,Product,Price
A001,Keyboard,49.99
A002,Mouse,25.00

Try the sample Excel file in the converter above. Choose Comma and UTF-8 to match this example. The default UTF-8 with BOM option also works and can help Excel display special characters correctly.

File formats

XLSX and CSV Explained

What is XLSX?

XLSX is the default spreadsheet format used by Microsoft Excel. It stores worksheets, formulas, formatting, and structured spreadsheet data.

What is CSV?

CSV, or Comma-Separated Values, is a simple text format used to exchange data between applications, databases, analytics tools, and AI workflows.

Private by design

Your workbook never leaves this tab

Your file stays in your browser and is never uploaded.

Processed locally

Your workbook is read and converted right here in this browser tab.

No account required

No account, email address, or payment details required.

Visible sheets stay separate

Each visible worksheet becomes its own CSV. Hidden sheets are skipped.

No upload: your file is converted in this tab. We do not receive your file name or file content.

Supported files & options

XLSX to CSV Conversion Options

Input files	Microsoft Excel .xlsx and legacy .xls
Maximum file size	10 MB per Excel file. Very large sheets may need to be split into smaller files.
Download	One CSV per sheet. If there are multiple visible sheets, you’ll receive a ZIP containing the CSV files.
Delimiter	Comma, semicolon, tab, or pipe
Text encoding	UTF-8 or UTF-8 with BOM. The second option is selected by default to help Excel display special characters.
First row	Choose whether to include the first row of every sheet, which often contains column names.
Privacy	Your Excel file is converted in your browser, without being uploaded.

Seeing strange characters when you open a CSV in Excel? Read our guide to fixing CSV text and encoding problems.

Before you export

What Does CSV Preserve from Excel?

Excel content	What happens in CSV
Cell values	Keeps the values shown in Excel as text, including formatted dates and percentages.
Multiple worksheets	Each visible worksheet becomes a separate CSV; multiple CSV files download as ZIP.
Formulas	Keeps the last saved result, if available, instead of the formula. Formulas are not recalculated.
Colors, fonts, charts, and images	Not included in the CSV file.
Hidden worksheets	Not included in the download.
Leading zeros and dates	Some spreadsheet apps may change how these values appear when you open the CSV.

If some formula results are missing, open the workbook in Excel, recalculate and save it, then convert the file again.

Guides

Make the right CSV for the next step

Practical guides to fixing CSV encoding problems and choosing the right spreadsheet format for Claude.

Fix CSV UTF-8 encoding and garbled characters XLSX vs CSV for Claude: which format should you use?

Good to know

XLSX to CSV Frequently Asked Questions

How do I convert an Excel file to CSV?

Choose an XLSX or XLS file, preview your sheets, select your CSV options, and click Convert to CSV. Then download your CSV file, or a ZIP if the workbook has multiple visible sheets.

Can I convert XLSX to CSV without Microsoft Excel?

Yes. This free converter reads .xlsx and .xls files in your browser. You do not need Microsoft Excel, a software installation, or an account.

Can I convert multiple worksheets to CSV?

Yes. The converter exports each visible worksheet as a separate CSV. When your workbook has multiple visible worksheets, the CSV files are packaged into a ZIP. Hidden worksheets are skipped.

Compare XLSX and CSV for Claude

Will converting XLSX to CSV preserve formulas and formatting?

No. CSV contains text values rather than formulas, charts, colors, or workbook formatting. Saved formula results are used when available; this tool does not recalculate formulas.

Does my Excel file stay private?

Yes. Your workbook, worksheet names, and cell contents are processed locally in your browser and are not uploaded to our servers.

What is the maximum Excel file size?

You can convert XLSX or XLS files up to 10 MB. Very large sheets may also need to be split into smaller files.

Why are characters garbled when I open a CSV in Excel?

Excel sometimes guesses the wrong text encoding. UTF-8 with BOM can help when opening CSV in Windows Excel. You can also import the CSV using Excel’s text/CSV import option and explicitly select UTF-8.

Fix UTF-8 encoding and garbled CSV text

Ready to convert your workbook?

Choose an Excel file and create your CSV without uploading anything.

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