Simple Code Block Highlighter

Simple Code Block Highlighter enhances the default WordPress code and preformatted blocks. It can show line numbers, add a copy-to-clipboard button, switch between light and dark display themes, and color code by language with bundled Highlight.js syntax highlighting.

The plugin uses the WordPress Settings API, validates and sanitizes saved options, escapes admin output, and avoids inline JavaScript-generated HTML for line numbers. Syntax highlighting is served from the plugin files and does not load a third-party CDN on visitor pages.

Third-party Libraries

This plugin bundles Highlight.js 11.11.1 for syntax highlighting.

Highlight.js
Source: https://github.com/highlightjs/highlight.js
License: BSD 3-Clause
License file included at: assets/vendor/highlightjs/LICENSE