Convert XLS files to Excel in seconds. No watermarks, no sign-up — and your files are deleted automatically.
Drop your files here or browse
XLS files or any other supported format
Drag and drop your XLS files or click to browse.
Excel is pre-selected for you. Change options if you need to.
Click Convert and download your new Excel file instantly.
XLS is the legacy Excel 97–2003 workbook format. Converting it to XLSX makes files smaller and more compatible.
XLSX is the Microsoft Excel workbook format, supporting multiple sheets, formulas, charts and rich formatting.
Professional engines produce clean, accurate Excel files.
Convert up to 20 XLS files at once and get them back in a single ZIP.
HTTPS uploads, no human access, and automatic deletion after 60 minutes.
Drop your XLS file into the converter above, make sure Excel is selected, and click Convert. Your Excel file is ready to download in seconds.
Yes. FileFlexify converts XLS to Excel for free, with no watermarks and no sign-up required.
Files are uploaded over an encrypted HTTPS connection, processed automatically without human access, and permanently deleted after 60 minutes.
Yes — add up to 20 files (50 MB each). When you convert more than one file you'll receive a single ZIP with all your Excel files.
Create a free account to keep a history of your conversions and get higher usage limits.