WordPress 7.1 “Mary Lou”

WordPress 7.1 “Mary Lou”, released on Aug 19, 2026, focuses on improvements to the editor, accessibility, user interface, and administration. The release introduces new hooks, file changes, client-side media processing, and an always-iframed post editor, along with updates to the SVG Icon API. It also adds responsive block styles, a persistent admin bar, new blocks, improved block handling, and enhancements to the media editor and design system. Developers will also benefit from several new tools and improvements.

Credit: WordPress.org

Key Features for Theme Developers

Responsive block styles: WordPress 7.1 introduces built-in responsive styling for blocks across Posts, Pages, Templates, Patterns, template parts, and Navigation without custom CSS. Theme developers can define custom viewport breakpoints in theme.json, allowing responsive styles and block visibility to follow the theme’s design system.
Interactive state styling: Themes can define styles for states such as :hover, :focus, and :active without relying on custom CSS. Global Styles support is available for the Button block, while navigation link states can be configured through theme.json.
Expanded Icons API: WordPress 7.1 introduces a public Icons API that allows themes and plugins to register custom icon collections, add SVG icons, render them server-side, and access them through the REST API. Icons inherit the surrounding text color through currentColor, while developers can extend WordPress’s icon library with custom collections that are available throughout the editor alongside the built-in library.
Gradient and image backgrounds: More blocks can now combine background gradients with images. Themes can configure gradient support through theme.json, including global styles, individual blocks, and style variations.
New Tabs block: The Tabs block provides a native way to organize content into tabbed panels. Its tab controls support color, typography, border, and spacing settings, allowing the design to be adapted to a theme.
Improved Navigation block: Navigation receives enhancements to link creation and styling, including improvements related to responsive behavior and navigation link states.
Improved block width and layout controls: WordPress 7.1 refines layout and width controls, giving theme developers and users more consistent options for controlling block layouts.
Theme.json enhancements: theme.json gains several new capabilities, including responsive viewport settings, text-shadow support, block visibility configuration, feature-specific CSS variables, and a minimum-width option for block dimensions.
Always-iframed post editor: The post editor now always runs inside an iframe. Theme and block developers working with editor-side code need to account for the editor’s iframe environment.
Improved patterns and templates: Pattern editing and post-template layouts receive workflow and usability improvements, making reusable layouts and template-based designs easier to manage.
Admin bar everywhere: The WordPress admin bar now remains visible as users move between editors, providing consistent navigation from the dashboard to the editor. This helps users stay oriented and gives them easy access to familiar tools wherever they are. The admin bar also includes minor visual updates designed to enhance the overall user experience.
Improved media handing: The WP 7.1 improves faster and more flexible image processing. Image compression, resizing, and thumbnail generation are performed in the browser, reducing server load and producing smaller files without exceeding PHP memory limits or causing upload timeouts. Media handling in 7.1 also adds native support for AVIF, HEIC, and HDR gain maps, enabling seamless handling of image formats commonly produced by modern cameras and phones.

Wrapping Up

For theme developers, WordPress 7.1 focuses heavily on responsive design and expanding the capabilities of theme.json and block styling. The most significant additions are custom responsive breakpoints, responsive block styles, interactive states, enhanced background controls, the Icons API, improved Navigation and layout controls, and additional theme.json settings.