Drop your XLS files here
or click to select multiple files from your device
Maximum file size: 100 MBWhy Convert XLS Files?
The XLS format is the original Microsoft Excel file type, used widely for spreadsheets before being replaced by the newer XLSX format. While XLS is still supported, it has limitations: larger file sizes, slower performance with big datasets, and fewer advanced features compared to XLSX. In addition, some modern tools and platforms no longer fully support the older format.
That's why many users choose to convert XLS files into newer or alternative formats. Converting to XLSX ensures compatibility with the latest versions of Excel and other spreadsheet tools. In some cases, converting to CSV makes data easier to import into databases and applications, while converting to PDF is useful for sharing finalized, read-only reports.
Free Online XLS Converter
Convert your XLS files to XLSX, CSV, ODS, TSV, and over 4 other formats instantly. Our free XLS converter works in your browser for complete privacy — no registration required.
- Convert multiple XLS files at once (batch processing)
- Maintain original quality with smart compression
- 100% secure — files never leave your device
- Support for 4+ output formats
- Instant download — no waiting
- Works on all devices and browsers
Supported XLS Conversions
You can convert XLS to:
Frequently Asked Questions
How do I convert XLS online?
Upload your XLS files, select XLSX, CSV, ODS or any other format from the dropdown menu, and click convert. Your files will be ready for download instantly.
Can I convert multiple XLS files at once?
Yes! Upload multiple XLS files and they'll all be converted simultaneously. Large batches are automatically packaged as a ZIP file for download.
Is the XLS converter free to use?
Absolutely — our XLS converter is 100% free. No registration or payment required.
Is XLS conversion secure?
Yes, all XLS conversions are processed securely in your browser. Your files are never uploaded to our servers and remain completely private on your device.