XLS is a file format. Use PDF.to to convert XLS files to and from various other formats.

Is XLS conversion free?

Yes, our XLS converter is completely free for basic use.

XLS converter

convert XLS to and from various formats

About XLS

XLS (Microsoft Excel spreadsheet) is an older file format used for storing spreadsheet data. Although largely replaced by XLSX, XLS files can still be opened and edited in Microsoft Excel. They contain tabular data with formulas, charts, and formatting.

Common Uses

Working with legacy Excel documents
Compatibility with older systems
Spreadsheet data storage

XLS conversion FAQ

What is a XLS file?

XLS is the binary file format used by Microsoft Excel 97-2003.

How do I convert XLS files?

Simply upload your file using our drag-and-drop interface or click to browse. Select your desired output format, then click Convert. Your converted file will be ready for download within seconds.

Is the conversion free?

Yes, our converter is completely free for basic use. No registration required.

Will my file quality be preserved during conversion?

We strive to preserve quality as accurately as possible during conversion. The output quality depends on the source file and target format compatibility.

Can I convert to PDF?

Yes, PDF conversion is one of our most popular features. PDF format preserves your content layout exactly as intended, making it ideal for sharing and archiving.

What is the maximum file size?

Free users can convert files up to 100MB. This is sufficient for most files. Premium users have access to larger file limits.

Do I need special software?

No, you don't need any special software installed. Our converter works entirely in your browser and handles conversion server-side.

Are my files kept private and secure?

Absolutely. Your files are processed securely and automatically deleted from our servers after conversion. We don't read, store, or share your file contents. All transfers use encrypted HTTPS connections.