ClassyBlocks — Custom CSS Classes for Gutenberg Blocks

ClassyBlocks transforms how you style Gutenberg blocks. Instead of wrestling with theme CSS, writing repetitive rules, or switching back and forth between editors, you can create and apply custom CSS classes directly from the block editor — with real-time preview and one-click application.

Whether you’re building a simple landing page or a complex multi-site network, ClassyBlocks keeps your workflow fast, consistent, and maintainable.

Key Features

• Custom CSS Class Manager — Create your own library of CSS classes with full support for :hover, :focus, :active, and :visited pseudo-states. Name, describe, and organize each class with its own CSS rules.
• 9 Built-in CSS Frameworks — Bootstrap 5.3, Materialize, Pure CSS, Bulma, UIkit, Spectre, Semantic UI, Foundation, and Tailwind CSS. Toggle each framework on/off independently for the editor and the frontend.
• Live Preview in Gutenberg — See exactly how each class looks in real time, directly inside the block editor. No more guesswork or page reloads.
• One-Click Application — Apply any custom or framework class to a block with a single click. No typing class names manually.
• Pack Manager — Export, import, and share complete sets of CSS classes as packs. Perfect for agencies managing multiple sites or teams collaborating on design systems.
• Interactive Preview Mode — Test your classes interactively with Auto and Interactive modes that cycle through pseudo-states.

What you can do

• Design faster — Build a reusable library of utility classes and apply them across your entire site in seconds.
• Stay organized — Group classes into packs by project, component, or design system. Search, filter, and manage everything from one dashboard.
• Work with any theme — ClassyBlocks works with every WordPress theme. It integrates especially well with Blocksy, GeneratePress, Astra, and other modern block-ready themes.
• Keep performance tight — The plugin generates a minimal, optimized stylesheet with zero JavaScript overhead on the frontend. No bloat, no slowdowns.

Perfect for

• Developers and agencies building client sites with consistent design systems.
• Freelancers who want to speed up their Gutenberg workflow without custom coding every time.
• Site owners who want more design flexibility without installing a page builder.

ClassyBlocks — the smart way to manage CSS classes in WordPress.

How it works

1. Install and activate the plugin.
2. Go to the CSS Classes section and create your own classes with the properties you want.
3. Go to the page editor (Gutenberg).
4. In the “CSS Classes” section of each block, you can select the plugin’s custom classes.

You can easily combine classes to achieve complex results.

Credits

Developed by Studio Immens – Modular digital solutions for professionals and businesses.

License

This plugin is licensed under the GPL v2 or later.