XLSX to CSV Converter
Convert Excel files to CSV format with ease
Click to upload or drag and drop
XLSX or XLS files only
Convert Excel to CSV with Our Free XLSX to CSV Converter
Transform your Excel spreadsheets into CSV format instantly with our powerful online tool. Whether you need to convert a single sheet or handle multiple worksheets, our XLSX to CSV converter makes the process simple, fast, and completely free.
What Does This XLSX to CSV Converter Do?
Our XLSX to CSV converter is a specialized online tool designed to convert Microsoft Excel files (XLSX and XLS formats) into CSV (Comma-Separated Values) format. CSV files are universally compatible with databases, data analysis tools, and programming languages, making them essential for data processing and integration tasks.
The converter intelligently detects all worksheets in your Excel file and provides flexible options to either merge them into a single CSV file or export each sheet as a separate CSV, packaged conveniently in a ZIP archive. This versatility makes it perfect for data analysts, developers, and business professionals who work with spreadsheet data regularly.
Key Features of Our Excel to CSV Tool
Multiple Sheet Support
Automatically detects and processes all worksheets in your XLSX file. Handle complex workbooks with multiple sheets effortlessly.
Lightning-Fast Conversion
Convert your Excel files to CSV format in seconds. No waiting, no delays—just instant results powered by efficient client-side processing.
100% Secure & Private
Your files never leave your browser. All conversions happen locally on your device, ensuring complete privacy and data security.
Flexible Download Options
Choose to download a single combined CSV file or get each sheet as a separate CSV in a convenient ZIP archive.
Why Choose Our XLSX to CSV Converter?
No Installation Required
Use our web-based converter directly in your browser without downloading any software. Works on Windows, Mac, Linux, and mobile devices.
Completely Free
Convert unlimited Excel files to CSV format at no cost. No subscriptions, no hidden fees, no limitations on file size or number of conversions.
Perfect for Data Professionals
Ideal for data analysts, developers, scientists, and business professionals who need to convert spreadsheet data for databases, programming scripts, or data analysis tools.
Preserves Data Integrity
Your data structure, formatting, and content remain intact during conversion, ensuring accurate results every time.
How to Convert XLSX to CSV in 3 Simple Steps
Upload Your Excel File
Click the upload area or drag and drop your XLSX or XLS file. The converter will automatically detect all worksheets in your file and display the sheet count.
Choose Your Conversion Mode
If your workbook has multiple sheets, select either "Separate Files (ZIP)" to get each sheet as an individual CSV file, or "Combined File" to merge all sheets into one CSV.
Download Your CSV Files
Click the "Convert to CSV" button and your converted files will download automatically. For multiple sheets, you'll receive a ZIP file containing all CSV files.
Frequently Asked Questions
What's the difference between XLSX and CSV formats?
XLSX is Microsoft Excel's file format that supports multiple sheets, formatting, formulas, and complex features. CSV (Comma-Separated Values) is a simple text format that stores tabular data as plain text, making it universally compatible with almost any database, programming language, or data analysis tool.
Is there a file size limit for the XLSX to CSV converter?
Since all processing happens in your browser, the file size is limited by your device's available memory. Most modern computers can easily handle Excel files up to several hundred megabytes. Very large files may take longer to process.
Are my files stored on your servers?
No, absolutely not. All file processing happens entirely in your web browser. Your files never get uploaded to any server, ensuring complete privacy and security of your data.
What happens to formulas when converting Excel to CSV?
CSV format doesn't support formulas. When you convert XLSX to CSV, formulas are replaced with their calculated values, ensuring your data remains accurate in the CSV output.
Can I convert XLS files (older Excel format)?
Yes! Our converter supports both XLSX (Excel 2007 and later) and XLS (Excel 97-2003) file formats. Simply upload your file and the conversion process is identical.
Which conversion mode should I choose?
If you need to work with sheets separately (for example, importing into different database tables), choose "Separate Files (ZIP)." If you want all data in one file for easier processing, choose "Combined File." The combined mode adds clear sheet labels between each worksheet's data.
Ready to Convert Your Excel Files?
Start converting your XLSX files to CSV format now. It's fast, free, and secure. No registration required—just upload and convert!
Our XLSX to CSV converter is designed to meet the needs of modern data professionals. Whether you're preparing data for import into SQL databases, processing information for Python or R scripts, or creating files for data analysis platforms, our tool delivers reliable results every time. The ability to handle multiple worksheets and choose your preferred output format makes this converter versatile enough for any spreadsheet conversion task.
Converting Excel files to CSV format is a common requirement in data science, web development, business intelligence, and data migration projects. CSV files offer maximum compatibility across different systems and applications, making them the preferred format for data exchange. With our online converter, you can transform your spreadsheets quickly without the need for Excel or any other specialized software.