Convert XLS to CSV
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How to Convert XLS to CSV
Converting an Excel file to CSV format takes just three simple steps using our free online tool — no software download or registration required.
Why Use Our XLS to CSV Converter?
Our tool is built for speed, privacy, and simplicity — whether you need to convert one file or hundreds.
XLS vs CSV – What’s the Difference?
Understanding when to use XLS vs CSV helps you work more efficiently with data across different tools and platforms.
| Feature | XLS / XLSX | CSV |
|---|---|---|
| Multiple sheets | ✓ Yes | ✗ No |
| Formulas & calculations | ✓ Yes | ✗ No |
| Charts & formatting | ✓ Yes | ✗ No |
| Universal compatibility | ✗ Limited | ✓ All apps |
| Import into databases | ✗ Complex | ✓ Native |
| File size (same data) | Larger | Smaller |
| Human-readable | ✗ Binary | ✓ Plain text |
| Best for | Reports, dashboards, finance | Data imports, APIs, databases |
When should you convert XLS to CSV?
You should convert XLS to CSV when you need to import data into a database, CRM, e-commerce platform, or any web application. CSV files are universally supported by tools like MySQL, PostgreSQL, Shopify, Salesforce, Google Sheets, and Python pandas.
When should you convert CSV to XLS?
Convert CSV to XLS when you need to share a data file with colleagues who need to view it in Excel with proper formatting, add formulas, or create charts. XLS/XLSX format preserves column types and is easier to work with in Microsoft Office.
Convert XLS to CSV Programmatically
Need to automate XLS to CSV conversion? Here are the most common approaches for developers.
Python (pandas)
import pandas as pd
df = pd.read_excel('data.xlsx', sheet_name=0)
df.to_csv('output.csv', index=False, encoding='utf-8')Command line (Python)
python3 -c "import pandas as pd; pd.read_excel('data.xls').to_csv('out.csv', index=False)"For batch conversion of multiple XLS files, loop through the directory and apply the same pandas conversion to each file. Our online tool is best for quick, one-off conversions without writing any code.