Convert XLS to XLSX Online - Fast & Free
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About this conversion
Easily convert your legacy XLS spreadsheet files to the modern XLSX format with Convert2.co. Our powerful online tool ensures a seamless transition, preserving your data integrity and compatibility with the latest software. Whether you're working with older versions of Microsoft Excel or need to share spreadsheets with colleagues using newer applications, this XLS to XLSX converter is your solution. Experience fast, reliable conversions without any software installation. Unlock enhanced features and improved performance by migrating your spreadsheets to the more robust XLSX format. Perfect for businesses, students, and anyone managing data in Excel.
📋 How to Convert XLS to XLSX
Upload
Select or drag your XLS file to the converter
Convert
Click the convert button and wait a moment
Download
Get your converted XLSX file instantly
XLS
The XLS format is the original binary file format for Microsoft Excel spreadsheets, used from Excel 97 up to Excel 2003. It stores data, formulas, formatting, and charts in a proprietary binary structure. While widely compatible with older systems, XLS files are known for their larger file sizes due to less efficient data compression and can sometimes struggle with advanced features, larger datasets, and modern Excel functionalities.
XLSX
XLSX is the default XML-based spreadsheet file format introduced with Microsoft Excel 2007. It's a more efficient and robust format, using ZIP compression to significantly reduce file size compared to XLS. XLSX supports a wider range of features, larger datasets, improved security, and better interoperability with other applications, making it the standard for modern spreadsheet management.
Why Convert XLS → XLSX?
Converting XLS to XLSX is crucial for several reasons. The XLSX format offers superior compatibility with the latest versions of Microsoft Excel and other modern office suites, ensuring your spreadsheets open and function correctly. It also provides enhanced security features and better performance, especially with large datasets. Migrating from XLS to XLSX allows you to leverage advanced Excel functionalities, reduces file sizes through better compression, and prevents potential data corruption or compatibility issues when sharing files.
XLS vs XLSX
The primary difference between XLS and XLSX lies in their underlying structure and efficiency. XLS is an older, binary format, often resulting in larger files and limitations with newer Excel features. XLSX, conversely, is an XML-based, zipped format that is more compact, secure, and supports a vastly expanded range of capabilities, including more rows and columns, advanced charting, and better data handling. For modern workflows, collaboration, and larger datasets, XLSX is the preferred format due to its performance and feature set, while XLS remains relevant mainly for legacy system compatibility.
❓ Frequently Asked Questions
How do I convert XLS to XLSX?
To convert your XLS file to XLSX, simply visit Convert2.co, navigate to the XLS to XLSX converter, upload your XLS file using the 'Choose File' button, and click 'Convert'. Once the process is complete, you can download your new XLSX file.
Is the XLS to XLSX conversion free?
Yes, Convert2.co offers free unlimited conversions for XLS to XLSX. You can convert as many files as you need without any hidden costs or subscription requirements.
What is the quality of XLSX output?
Our converter strives to maintain the highest possible quality, preserving your original data, formulas, formatting, and charts as accurately as possible during the XLS to XLSX conversion.
Can I convert multiple XLS files at once?
Currently, our XLS to XLSX converter processes one file at a time to ensure optimal performance and accuracy for each conversion. You can, however, easily upload and convert multiple files sequentially.