If you are unable to open an Excel file? You can use this tool to repair your corrupt Microsoft Excel files easily the right way.

For those cautious about third-party software, LibreOffice is a free and open-source alternative that supports various file types. If the file opens in LibreOffice, save a duplicate, which will then ...

If you cannot open an Excel file and see Excel cannot open the file because the file format or extension is not valid error, see this post.