LumiCode Syntax Highlighter

LumiCode is a premium-quality syntax highlighter built for developers and technical bloggers who want beautiful, readable code on their WordPress site – without fighting the editor.

Key Features

• 40+ languages auto-detected – PHP, JavaScript, TypeScript, Python, Go, Rust, SQL, YAML, Bash, and more
• 13 bundled themes – Atom One, Dracula, GitHub, Monokai, Night Owl, Nord, Solarized, VS 2015, Xcode, and more, powered by highlight.js 11.11.1
• Dark & Light mode – toggle from the admin topbar. Applies to both admin UI and frontend code boxes
• Copy to Clipboard – one-click copy button on every code block
• Line numbers – perfectly aligned, synced to font size and line height
• Collapse / Expand – long code blocks auto-collapse after a configurable number of lines
• Filename / language badge – shows in the titlebar of every code box
• TinyMCE integration – Insert Code Block button in the Classic Editor toolbar, with language detection and all options
• Gutenberg block – native block editor support
• Code Scanner – scans your entire site for bare <pre> blocks and lets you apply LumiCode with one click, or dismiss
• Auto-detect – wraps any existing <pre> blocks automatically on the frontend without touching your content

How It Works

LumiCode renders code blocks server-side (shortcodes + TinyMCE insertion) and enhances them on the frontend with a lightweight JS renderer. The renderer wraps <pre class="lumicode-pre"> elements in a beautiful VS Code-style chrome (titlebar, statusbar, line numbers, copy button) and runs highlight.js for syntax coloring.

No page builders required. Works with any theme.

Shortcode Usage

[lumicode lang="javascript"]
const greeting = "Hello, world!";
console.log(greeting);
[/lumicode]

All shortcode attributes:
* lang – language identifier (e.g. php, python, typescript)
* title – filename shown in titlebar (e.g. config.js)
* highlight – lines to accent (e.g. 1,3-5)
* collapse – force collapse (true/false)
* collapse-after – collapse after N lines (overrides global setting)

Performance

• highlight.js is loaded locally (v11.11.1) for speed and privacy
• Our CSS and JS are tiny (<15 KB combined, unminified)
• No jQuery dependency on the frontend