Summary:
This post cover easy troubleshooting tricks to fix xls file format is not valid error.
In short and precise way I can tell you that “file format is not valid” error can easily be fixed by trying easy fixes like: changing Excel file extension, or using Excel inbuilt repair tool (open and repair) etc..
But if you are getting invalid file format error because of the corruption issue then you must try the professional’s recommended Excel repair software.
Read the complete post to catch detailed information about all these fixes…!
How To Fix File Format Is Not Valid Error?
