TinyMCE Custom Styles is a free WordPress plugin designed to improve the editing experience within the TinyMCE visual editor. This tool allows users to add custom CSS styles to the editor, making it easier to format content as it would appear on the website. It features a user-friendly backend GUI that enables the dynamic creation, modification, and deletion of styles in the TinyMCE ‘Formats’ dropdown, enhancing productivity for content creators.

The plugin installs two CSS stylesheets: 'editor-style.css' for the TinyMCE editor and 'editor-style-shared.css' for both the frontend and editor. Users can easily integrate their own CSS into these files and avoid direct source code editing. TinyMCE Custom Styles also supports Gutenberg classic blocks and works in WordPress MultiSite environments, making it a versatile choice for users looking to streamline their content editing process.