XLS to XLSX Converter
Convert your XLS files to XLSX format. Quick, safe, and completely free.
or drag and drop files here
XLS files • Max 25MB per file • Up to 10 files
Format Information
XLS
XLS is the legacy Microsoft Excel spreadsheet format used from Excel 97 through Excel 2003. While replaced by XLSX, XLS files are still encountered in older spreadsheets and remain compatible with most spreadsheet applications and office suites.
XLSX
XLSX is the modern Microsoft Excel spreadsheet format based on Open XML. It supports multiple worksheets, formulas, charts, pivot tables, and conditional formatting. XLSX is the default format for Excel and is widely supported by other spreadsheet applications.
How to convert XLS to XLSX
Upload XLS file(s)
Select files from Computer, Google Drive, Dropbox, or drag them on the page.
Choose "XLSX"
Choose XLSX or any other format you need as a result.
Download your XLSX
Let the file convert and download your XLSX file right afterwards.