Try to convert files that were exported directly from Word or Excel rather than scanned images.
Files uploaded by users can vary widely in quality. Some may be incomplete, poorly scanned, incorrectly formatted, or missing essential information. For professional or academic work, you might not want to rely on such unpredictable materials. Pdfcoffee Excel
Before clicking download, look at the file URL. Does it end in .xlsx or .xls ? Be wary of .exe or .zip files disguised as Excel sheets. Try to convert files that were exported directly
: Quick references for keyboard shortcuts (F1–F12) and data types. Pdfcoffee Excel