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.
Open the Excel file while your Wi-Fi is off. Some macros "phone home" to confirm if the file is pirated. If the file refuses to open without an internet connection, delete it immediately. Pdfcoffee Excel
However, for the professional or the security-conscious user, the risks often outweigh the rewards. The potential for malware, the legal gray area of copyright, and the availability of legitimate free alternatives (like Microsoft Create or Google Sheets) make Pdfcoffee a second-tier choice. Before clicking download, look at the file URL
Upload the downloaded .xlsx file to VirusTotal.com . This site scans the file with 60+ antivirus engines. If any flag it as malicious, do not open it. Open the Excel file while your Wi-Fi is off