Oxygen Classic is a WordPress plugin built by Soflyy for designing entire websites through a visual editor. Unlike most page builders, it replaces the active WordPress theme and allows users to create layouts, templates, headers, footers, and dynamic content directly inside the builder. It also integrates with popular WordPress tools such as Advanced Custom Fields (ACF), Toolset, WooCommerce, and Gutenberg.
The builder is aimed primarily at developers, agencies, freelancers, and advanced WordPress users who want more control over structure, styling, and performance. Oxygen Classic is known for generating relatively clean code, supporting custom PHP, HTML, CSS, and JavaScript, and giving users the ability to create highly customized websites without being restricted by theme limitations.
It remains widely used despite the release of Oxygen 6, with ongoing maintenance updates for the Classic branch. The platform continues to appeal to professionals who prefer a developer-focused workflow and complete design flexibility.
Key Features
- Full visual website builder for WordPress
- Replaces traditional WordPress themes completely
- Design headers, footers, and templates visually
- Dynamic data integration with custom fields
- WooCommerce design and customization tools
- Support for custom PHP, HTML, CSS, and JavaScript
- Class-based styling and reusable design systems
- Responsive design controls for all devices
- Integration with ACF, Toolset, and Gutenberg
- Unlimited site usage with supported licenses
Oxygen Classic remains a strong choice for WordPress professionals who value control, flexibility, and performance. Its learning curve is steeper than beginner-focused builders, but it rewards users with a highly customizable development environment and fewer design limitations.




