You might somehow want to create a .tar.gz archive in Windows. Currently the web control panel that I use is DirectAdmin and it doesn't support extracting files from .zip archive. Uploading a single .tar.bz archive and extract it on the server is better (and faster) than uploading lots of files using ftp. 7-zip, an open source file archiver can create a .tar.gz archive easily.

1. You need the latest 7-zip 4.61 beta (or later). Download and install.

2. Select the folder that you want to add to the .tar.gz archive. Right click, and select 7-zip > 'Add to archive...' (1).

3. We need to create a .tar archive first. Choose 'tar' as Archive format (2).

4. Then, right click the newly created .tar archive. Select 7-zip > 'Add to archive' again. This time, choose 'GZip' (3) as the Archive format. For maximum compression, choose 'Ultra' (4) for compression level, and select 258 (5) for 'Word size'. You've successfully create a .tar.gz archive!