Click, Style, Save.
Tweak Joomla CSS - LIVE
RCA Themer lets you poke the page, find the rule, change the value, and move on with your life. Joomla styling does not need to be an archaeological dig.
FREE
Single site priority support
1 year of updates
Direct developer support
If it breaks, we fix it
Select It.
Change It.
Save It.
Themer makes styling simple.
What You Get
Live CSS Inspector
Select any element on the page, inspect it, and change it instantly.
Rule Editor
Change css values with a simple visual interface.
Save to custom.css
Save your changes directly to your Joomla custom.css file.
Core Features
Select any element
System plugin, chat module, and component
Find the matching rule
Themer finds the CSS rule for you -- with a click.
Preview changes live
See the result instantly as you edit.
Save to custom.css
Use either Joomla or EasySocial profile avatar
Parent / ancestor
Navigate the DOM to find the right rule.
Border, spacing, color
Edit common CSS properties visually and easily.
Works with Joomla 4/5/6
Fully tested and ready for modern Joomla.
Lightweight workflow
Fast, focused and easy to use
No stylesheet archaeology
Find and edit CSS elements without the guesswork.
Built for real site admins
Full compatible with J4/5/6, with J7+ stubbing
Click the element. Themer finds the rule.
Change the value. See it instantly.
Like it? Write it to Custom CSS.
Search keywords
Select it, Change it
Change styles, live.
Click any element, find the CSS rule behind it, change the value and see the result instantly. When it looks right, save it directly to your custom CSS file.
- Find the rule without hunting through stylesheets
- Preview changes directly on the live page
- Save the finished CSS when you're happy with it
Who It's For
Joomla Sites with custom.css
Take control of your site's style without complex tools.
Designers and themers
A faster, visual way to fine-tune your designs.
Admins / Developers
A handy simple tool for quick live changes to your website's styling.
Requirements & Compatibility
Joomla 4, 5, 6
Fully Tested on J4/5/6
PHP 8.1+
PHP 8.1 or higher
(8.2+ recommended)
Database
MySQL 5.7+
MariaDB 10.3+
Browser
All modern browsers
Responsive layout
Updates
via Joomla Updater
License
GNU GPL v2 or later
FREE
Single site priority support
1 year of updates
Direct developer support
If it breaks, we fix it
Features
Floating Styles panel on your live site.
Click elements, see matched rules, edit declarations.
Export dirty CSS so you can paste into custom.css yourself.
Optional live write to allowlisted CSS paths only.
Live write off by default. Super User required. CSRF protected.
Backups under css/_themer_bak/ when live write runs.
Same-origin CSS only. Inline styles, shadow DOM, and cross-origin sheets are limited.
Helix is the primary target. Many SPPB / JPageBuilder / core pages work when stylesheets are same-origin.
GPL Open Source
Free to use, modify and share
Instant Download
Download your ZIP immediately
Expert Support
Support from the RCA developer.
Regular Updates
Updates via Joomla Updater
Joomla 4/5/6/7+
Built for Joomla 4/5/6, + J7 stub