WP-SynHighlight is a free WordPress plugin designed to enhance productivity by providing syntax highlighting for code snippets in posts and comments. It features a full GUI mode that allows users to highlight code without switching to code mode, simplifying the editing process. The plugin includes a real-time syntax highlighting editor, customizable settings for blog-wide code appearance, and a user-friendly button for highlighting options, eliminating the need to memorize syntax commands.

The plugin supports a wide range of programming languages and offers various customization options to tailor the code display. Users can easily format their code using simple tags, and the plugin recognizes multiple parameters to adjust features such as line numbering, container types, and keyword capitalization. This comprehensive tool is ideal for bloggers and developers who want to present code snippets clearly and attractively.