Fast, secure and free online tool to convert legacy Excel XLS files to modern XLSX format. Preserve all tables, data and formatting. No watermark, no registration required.
Click or drag XLS file to upload
Your XLS has been converted to XLSX successfully.
Our free XLS to XLSX converter helps you convert older Excel XLS spreadsheets into modern XLSX format quickly and
easily.
Upgraded XLSX files are perfect for editing in the latest Microsoft Excel, data analysis, sharing, printing and archiving while keeping your
original spreadsheet tables, data and layout intact.
Learn how to convert XLS to XLSX effortlessly. Discover the benefits of upgrading to modern Excel format, step-by-step methods, and the best online tools for batch conversion.
Learn how to convert XLS to XLSX effortlessly to access enhanced features, better performance, and improved data security. Step-by-step guide and tool recommendations.
Learn how to seamlessly convert XLS files to the modern XLSX format for enhanced compatibility, security, and functionality in Excel. Discover free online tools and manual methods.