Convert XLS to XLSX
Upload your XLS file (Microsoft Excel 97–2003 spreadsheet) and get it back as XLSX (Microsoft Excel spreadsheet) in seconds.
How to convert XLS to XLSX
- Choose your XLS file, or drop it on this page.
- Check that XLSX is selected as the output format.
- Click Convert, then download your XLSX file.
Questions and answers
- Is it free to convert XLS to XLSX?
- Yes. You can convert up to 5 files a day for free, without an account.
- Are my files safe?
- Your upload is deleted as soon as the conversion finishes, and the result 15 minutes later. Nobody looks at your files.
- How big can my file be?
- Up to 50 MB per file on the free plan.