George Stephanis

Most themes are licensed under the GPL, which makes it completely legal for you to do whatever you like with them, so long as you don’t restrict what other people, in turn, can do with them. This is a type of copyleft license, and it means that you are free to redistribute any GPL-compliant themes any way you like!
Unfortunately, it’s often hard to actually do. While it’s easy to upload a theme as a zip file, it’s difficult to get the theme back afterwards! This plugin aims to make that a bit easier.
If your server is capable of making Zip archives, and your user account has the <code>edit_themes</code> capability, then this plugin will let you download any of your themes — including any modifications you’ve made to the code of it — as a Zip file that you can then reinstall on any other WordPress site!
Enjoy! 🙂
P.S. — If the author of your theme didn’t license it on a GPL-compliant license, make sure you’re not breaking any licensing terms by what you do with the theme once you’ve downloaded it!

Theme Downloader

A handy dandy plugin that tries to let you download any installed theme as a zip file.

CHRS Interactive

Theme & Extension Downloader is a simple utility plugin that allows WordPress administrators to download any installed plugin or theme as a ZIP file. Perfect for creating backups, migrating extensions between sites, or sharing custom plugins/themes.
Key Features:
<ul>
<li>Download any installed plugin as a ZIP file</li>
<li>Download any installed theme as a ZIP file</li>
<li>Bulk download multiple items in a single ZIP bundle</li>
<li>See active/inactive status at a glance</li>
<li>Seamless admin integration under Plugins and Appearance menus</li>
<li>Secure – admin-only with nonce verification</li>
</ul>
Use Cases:
<ul>
<li>Create quick backups before updating plugins</li>
<li>Migrate custom plugins to staging sites</li>
<li>Share custom-developed themes with clients</li>
<li>Archive plugins you want to keep for later</li>
</ul>
Simple & Lightweight:
This plugin does one thing and does it well. No bloat, no upsells, no tracking. Just a clean, simple interface for downloading your extensions.

Theme & Extension Downloader

Download any installed plugin or theme as a ZIP file directly from your WordPress dashboard.

Theme Downloader vs Theme & Extension Downloader