So if there are files inside a ZIP file that you want to convert—like for a PDF to DOCX or MP3 to AC3 —you must first extract the files using one of the methods described in the section above ...

Zip files compress your folders or files and save storage on your computer. They're also easier to send from device to device. Here's how to make one.

1] Using Windows File Explorer If you don’t already have a ZIP file created, you can simply select all your files, right-click on them, and select Compress to > Zip file.