turnformatXLS
XLS is the Excel format used before 2007. Converting it to XLSX or PDF makes it easy to open in today's apps.
Convertxls to xlsx
Upload your files and download them converted in seconds.
Drop your files here
or
Choose filesUp to 50 MB per file and 20 files at once
How to convert XLS to XLSX
This tool converts XLS files to XLSX right in your browser. There's nothing to install and no account to create: upload the file, pick XLSX and download it.
Upload your XLS file: drag it onto the upload area or click “Choose files”.
Check that the target format is XLSX and click “Convert”.
Download your XLSX file as soon as it's ready.
About the formats
XLSX
XLSX is Microsoft Excel's spreadsheet format since 2007. It stores data, formulas, charts and multiple sheets in one file.
Frequently asked questions
Is it free to convert XLS to XLSX?
Yes. Conversion is free, you don't need an account and the result has no watermark. You can upload files of up to 50 MB.
Do I lose quality converting XLS to XLSX?
Text, images and layout are preserved. An unusual font may be replaced with a similar one.
Is it safe to upload my files?
Your files are only used for the conversion and are deleted automatically after 60 minutes. They're never shared with anyone.
Can I convert several XLS files at once?
Yes. You can upload up to 20 files at once and convert them all with “Convert all”.
Does it work on mobile, Mac and Windows?
Yes. It works in any modern browser, on desktop and mobile, with nothing to install.