You cannot convert just any JPEG image to Excel spreadsheet, even if it is screenshot of the .xls file. However, you can import any picture on any of the lists in the spreadsheets when you open it using pretty much any spreadsheet editor available.
Convert JPEG bitmap image format to Microsoft Excel 97 to 2003 workbook.
We found 2 software records in the database related to .jpeg to .xls file format conversion.
Microsoft Windows software - convert jpeg to xls on Windows
A graphical data digitizing software
Convert from jpeg file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned jpeg to xls. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A 3D CAD translation softwate