Creating an archive from a directory without the directory name being added to the archive

From the 7-Zip Help file:

a (Add) command

Adds files to archive.

Examples

7z a archive1.zip subdir\

adds all files and subfolders from folder subdir to archive archive1.zip. The filenames in archive will contain subdir\ prefix.

7z a archive2.zip .\subdir\*

adds all files and subfolders from folder subdir to archive archive2.zip. The filenames in archive will not contain subdir\ prefix.

cd /D c:\dir1\

7z a c:\archive3.zip dir2\dir3\

The filenames in archive c:\archive3.zip will contain dir2\dir3\ prefix, but they will not contain c:\dir1\ prefix.

So the command you'd want would be: 7za.exe a folder1.zip .\folder1\*

Also, pay attention to 7-Zip's handling of wildcards. It doesn't treat *.* as "all files" -- it means "all files with a period in the filename." Extension-less files will be missed. If you really want all files, just use * instead.

Finally, the -tzip parameter isn't needed if the archive filename ends in .zip. 7-Zip is smart enough to figure out which format you want in those cases. It's only required when you want a custom extension (e.g. 7za.exe a -tzip foo.xpi <files> for a Mozilla Add-on).

This worked for me

Consider folder structure like C:\Parent\SubFolders..... And you want to create parent.zip which will contain all files and folders C:\Parent without parent folder [i.e it will start from SubFolders.....]

cd /D "C:\Parent"

"7z.exe" a Parent.zip "*.*" -r

This will create Parent.zip in C:\Parent