Convert XLS to CSV – The Complete Step-by-Step Guide (2024)

Convert XLS to CSV – Step-by-Step Guide (2024) | Free & Easy Methods

Introduction

If you work with spreadsheet data, you have probably faced the need to convert an XLS file to CSV format. Whether you are moving data between systems, uploading to a database, or sharing with developers, CSV is the universal format that works everywhere.

In this comprehensive guide, you will learn every method to convert XLS to CSV — from Microsoft Excel to Python scripts to free online tools. No technical background required.

What is the Difference Between XLS and CSV?

Before diving into conversion methods, it is important to understand what these formats are and why you might need to switch between them.

Feature	XLS / XLSX	CSV
Format	Binary / XML	Plain Text
Multiple Sheets	Yes	No (single sheet)
Formulas	Yes	No
Compatibility	Excel only	Universal
File Size	Larger	Smaller
Database Import	Limited	Excellent

Method 1: Convert XLS to CSV Using Microsoft Excel

The simplest method for most users is to use Microsoft Excel directly. Here is the exact process:

1. Open your XLS or XLSX file in Microsoft Excel.
2. Click on File in the top-left corner menu.
3. Select Save As from the dropdown options.
4. Choose your desired save location (Desktop, folder, etc.).
5. In the ‘Save as type’ dropdown, select CSV (Comma delimited) (*.csv).
6. Click Save.
7. A popup will appear warning that some features may be lost. Click Yes to continue.
8. Your CSV file is now saved in the selected location.

Important Note: If your XLS file has multiple sheets, Excel will only save the currently active sheet as CSV. You will need to repeat this process for each sheet.

Method 2: Convert XLS to CSV Using Google Sheets

Google Sheets is a free alternative that works perfectly for this conversion:

9. Go to sheets.google.com and sign in with your Google account.
10. Click on the folder icon to upload your XLS file.
11. Once uploaded, the file will open in Google Sheets.
12. Go to File > Download > Comma Separated Values (.csv).
13. The file will automatically download to your computer.

This method is completely free and works on any device with a browser.

Method 3: Convert XLS to CSV Online (Free Tools)

Several free online tools can convert XLS to CSV without any software installation. Popular options include Convertio, CloudConvert, and Zamzar. Simply upload your file, select CSV as output, and download the result.

For a dedicated, fast solution, check our Online XLS to CSV Converter for instant conversion without file size limits.

Method 4: Convert XLS to CSV Using Python

For developers and data engineers who need to automate this process, Python offers the most powerful solution using the pandas and openpyxl libraries.

Install Required Libraries

pip install pandas openpyxl

Basic Conversion Script

import pandas as pd

# Read the XLS/XLSX file

df = pd.read_excel(‘input_file.xlsx’, sheet_name=0)

# Save as CSV

df.to_csv(‘output_file.csv’, index=False)

print(‘Conversion complete!’)

Convert All Sheets in XLS to Separate CSV Files

import pandas as pd

xls = pd.ExcelFile(‘input_file.xlsx’)

for sheet_name in xls.sheet_names:

    df = pd.read_excel(xls, sheet_name=sheet_name)

    df.to_csv(f'{sheet_name}.csv’, index=False)

    print(f’Converted: {sheet_name}.csv’)

Method 5: Convert XLS to CSV Using Command Line (PowerShell)

Windows users can use PowerShell for quick conversions without opening any GUI application:

$excel = New-Object -ComObject Excel.Application

$excel.Visible = $false

$workbook = $excel.Workbooks.Open(‘C:\path\to\your\file.xlsx’)

$workbook.SaveAs(‘C:\path\to\output.csv’, 6)  # 6 = CSV format

$workbook.Close($false)

$excel.Quit()

[System.Runtime.InteropServices.Marshal]::ReleaseComObject($excel)

Troubleshooting Common XLS to CSV Conversion Problems

Problem 1: Special Characters Are Corrupted

Solution: Save the CSV with UTF-8 encoding. In Python, use: df.to_csv(‘output.csv’, index=False, encoding=’utf-8-sig’)

Problem 2: Dates Are Formatted Incorrectly

Solution: In Excel, format date columns as text before saving as CSV. In Python, use: df[‘date_col’] = df[‘date_col’].dt.strftime(‘%Y-%m-%d’)

Problem 3: Large Files Take Too Long

Solution: Use Python with chunked processing for files over 100MB. This processes data in batches rather than loading everything into memory.

Frequently Asked Questions (FAQs)

Can I convert XLS to CSV without Excel?

Yes! You can use Google Sheets (free), online tools like Convertio or CloudConvert, or Python with the pandas library. None of these require Microsoft Excel to be installed.

Will I lose data when converting XLS to CSV?

CSV format does not support formulas, multiple sheets, formatting, or charts. The raw data values are preserved, but any calculations will be converted to their results. Always keep your original XLS file as backup.

How do I convert multiple XLS files to CSV at once?

Use Python’s pandas library in a loop, or check our Bulk XLS to CSV Conversion Guide for step-by-step instructions on batch processing.

What encoding should I use for CSV files?

UTF-8 is the most widely compatible encoding. If your CSV will be opened in older Excel versions, use UTF-8-BOM (utf-8-sig in Python) to avoid character corruption.

What is the maximum file size for online XLS to CSV converters?

Most free online tools limit files to 10-100MB. For larger files, use Python or Excel directly as there is no file size limit.

Internal Linking Suggestions

• Convert CSV to XLS Guide – /convert-csv-to-xls
• Online XLS to CSV Converter – /online-xls-to-csv
• Convert XLS to CSV Using Python – /xls-to-csv-python
• Bulk XLS to CSV Conversion – /bulk-xls-to-csv