Select Files
or drag and drop files here
Upload an Excel file (.xlsx or .xls)
How to Convert Excel to CSV
Upload .xlsx or .xls file
First sheet extracts automatically
Download CSV output
Use in any system that accepts CSV files
Supported File Formats And Data Handling
This tool processes .xlsx and .xls files by extracting only the first worksheet. It resolves all formulas to their calculated values before exporting, ensuring the CSV contains static data rather than formula references. The output is a UTF-8 encoded file that handles international characters and automatically quotes commas within cell values to maintain data integrity.
Convert A Sample Sales Report
- Upload a file named 'Q1_Sales.xlsx' containing 500 rows of data.
- The tool reads the first sheet and calculates the formula in cell D2 (e.g., =B2*C2) resulting in 1250.00.
- The converter strips all cell colors and bold formatting from the header row.
- The final CSV file 'Q1_Sales.csv' downloads with 500 rows of plain text data ready for database import.
- The resulting file size is approximately 45KB, significantly smaller than the original 120KB Excel file.
When To Use This Excel To CSV Converter
- Importing customer lists into a CRM system that requires flat text files
- Uploading inventory data to an API that only accepts CSV payloads
- Preparing data for analysis in Python, R, or SQL scripts
- Sharing financial reports with stakeholders who do not have Excel installed
- Reducing file size for email transmission or cloud storage limits
CSV Format Limitations Versus Excel
Key Features
First Sheet Extraction
Converts the first worksheet only. Multi-sheet workbooks require converting each sheet separately.
Formula Resolution
Exports calculated values, not formula text. =SUM(A1:A10) becomes the numeric result in CSV.
Legacy Format Support
Handles .xls (Excel 97-2003) and .xlsx (Excel 2007+) files using SheetJS library.
Privacy & Security
Client-side processing. Files never leave your browser.
Frequently Asked Questions
What happens to formulas?
The converter resolves all formulas to their calculated values before exporting. A formula like =VLOOKUP(A1,Sheet2!B:C,2,0) appears as the resulting text or number, such as 'Widget A'. This approach prevents #REF! errors because CSV files cannot maintain references to other worksheets.
How do I convert sheets other than the first one?
This tool processes only the first worksheet of your workbook. To convert additional sheets, open the file in Excel, right-click the desired sheet tab, and select Move or Copy to create a new workbook containing just that sheet. Save the new file and upload it to the converter for processing.
What happens to merged cells?
Only the value in the top-left cell of a merged range exports to the CSV file. All other cells within that merged area become empty in the output. You must unmerge cells in Excel before conversion if you need to preserve values from the entire range.
Will my dates export correctly?
Dates export as the text string currently displayed in your Excel cells. If Excel shows 1/15/2024, the CSV file will contain exactly that text. For specific formats like YYYY-MM-DD, apply the desired number format to the column in Excel before running the conversion.
Does this work with password-protected files?
No, the tool cannot process files encrypted with a password. You must remove the protection in Excel by navigating to File, Info, Protect Workbook, and selecting Encrypt with Password to delete the password before uploading.
What's the file size limit?
The limit depends on your browser's available memory rather than a fixed file size. Most modern browsers handle files between 50 and 100 MB effectively, but very large spreadsheets may process slowly or fail on older devices. Performance varies based on your specific hardware and browser configuration.