Click the «Choose files» button and select the XLS files you want to convert to XLSX.
Select «XLSX» as the target format. Click «Convert» to start converting XLS to XLSX. It only takes a few seconds.
Done! Your XLS file has been converted to XLSX format. You can download it to your device.
The XLS files are used in Microsoft Excel 97 to 2003 for Workbooks, spreadsheet document files. The XLS is Microsoft Excel's proprietary file format for storing its documents. The latest versions of Microsoft Office use XLSX file format.
The XLS files are used in Microsoft Excel 97 to 2003 for Workbooks, spreadsheet document files. The XLS is Microsoft Excel's proprietary file format for storing its documents. The latest versions of Microsoft Office use XLSX file format. XLSX format uses ZIP compression for smaller file sizes.
| 🔁 Conversion | XLS to XLSX |
| ⏱ Time to convert | 20 seconds |
| 💳 Cost | Free |
| 📂 File types | Spreadsheets |
| ✳️ File extensions | .xls, .xlsx |
| 📏 File size limit | 75 MB |
| 👩💻 Supported OS | Windows, Linux, MacOS, iOS, Android |
You don't need to download and install any software to convert .xls files to .xlsx format. All conversions take place in the cloud.
Your files are completely safe and accessible only to you. All files will be permanently deleted within 2 hours after conversion.
Convert your xls files to xlsx in 2 clicks. And don't pay anything for it! Our XLS to XLSX Converter is free for all users.