How to convert .xlsx files to .png format.
Converting Microsoft Excel Spreadsheets directly to Portable Network Graphics (.xlsx to .png conversion) is not really straightforward, and you might have to use small workarounds.
Using the common "Save As" window, you can simply save your .xlsx file to a variety of formats, including PDF. JPEG is, however, not on the list. Fortunately, there are several different ways to convert an .xlsx file to .png format; on a desktop device, or online.