Description
Extender Pro adds to WordPress’s native block editor a set of style options missing out of the box, such as fine spacing, custom colors, borders, shadow, and hover effect, all directly in the side panel of each block, with a visual customization framework without an extra plugin per feature. It serves those who develop WordPress sites and need more visual control over each block without resorting to loose CSS scattered across each page.
Main Features of Extender Pro
- Style options per block
Adds spacing, border, shadow, and custom color to each native block. - Hover effects
Creates hover and transition states without writing a single line of CSS. - Integrated side panel
Shows the extra options directly in the block editor’s side panel. - Reusable CSS classes
Saves style combinations as a class to apply to other blocks later. - Per-device responsiveness
Adjusts spacing and size separately for phone, tablet, and desktop.
Benefits of Extender Pro
- Less loose CSS
Reduces the need for an extra style sheet for simple visual adjustments. - More control in the editor
Gives the block editor visual options that used to exist only through code. - Consistency across pages
Keeps the same visual pattern by repeating previously saved style classes. - Layout adapted per screen
Adjusts the block’s appearance for each screen size without rework.
Who Is Extender Pro For?
- Those who develop WordPress sites using only the native block editor.
- Those who build custom layouts without resorting to a separate page builder.
- Those who need to adjust spacing and color block by block in each project.
- Those who handle a site’s visual side without opening a code editor.
How to Download Extender Pro
Extender Pro is available for download here on Ultrapack. After downloading the file, install it via Plugins > Add New > Upload Plugin, activate it, and the new style options appear in the side panel of each block in the editor.
The native block editor has covered much of what used to require an entire page builder, but it still lacks fine spacing and visual state options. Filling that gap directly in the standard panel avoids switching between different plugins just to resolve a style detail on a single block.
Frequently asked questions
Is CobaltApps Extender Pro GPL-licensed?
Yes. CobaltApps Extender Pro is distributed under the GPL (GNU General Public License). You may legally use, modify and redistribute it on as many sites as you want.
Can I use CobaltApps Extender Pro on multiple sites?
Yes. You can use CobaltApps Extender Pro on multiple sites. The number of sites connected to Ultrapack Auto Updater is limited by your plan.
How much does CobaltApps Extender Pro cost at Ultrapack?
CobaltApps Extender Pro costs US$2.99 as a single purchase, and it is also included in the subscription plans starting at US$12/mo (VIP I).
Does CobaltApps Extender Pro include updates?
Yes. The current version of CobaltApps Extender Pro is 1.4.7, published at Ultrapack on Jul 6, 2026. Subscribers update straight from the WordPress dashboard with UAU (Ultrapack Auto Updater).
Is CobaltApps Extender Pro scanned before publication?
Yes. Every version of CobaltApps Extender Pro goes through a malware scan (ClamAV and YARA rules, at UltraHub) before it is published.
How to install
Automatic updates: this item is updated by the Ultrapack Auto Updater. With it installed, the new version shows up in your dashboard like any other WordPress update (how to set it up).
- Download the file
extender-pro.zip. - In the WordPress dashboard, go to Plugins > Add New > Upload Plugin.
- Select the file
extender-pro.zipand click Install Now. - Click Activate.
Stuck on a step? Open a ticket telling us which one you stopped at.

UAU Ready