This utility program can help you extract compressed files and create your own compressed files in several different formats. To extract TAR files using 7-Zip, follow the below steps: ...

Select the files you want to include in the .tar.gz file. Right-click on the selected files and hover over “7-Zip” in the context menu that appears.

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 ...

If you wish to upload single files from an archive, you'll need to use the extract function in 7-Zip. When you open an archive in 7-Zip, all of the files in it are displayed.