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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 automatically color code blocks 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.
For setup help, read the <a href="https://www.techgrapple.com/simple-code-block-highlighter-free-plugin-for-wordpress/" rel="nofollow ugc">Simple Code Block Highlighter guide</a>.
<h3>Third-party Libraries</h3>
This plugin bundles Highlight.js 11.11.1 for syntax highlighting.
Highlight.js 
Source: <a href="https://github.com/highlightjs/highlight.js" rel="nofollow ugc">Highlight.js on GitHub</a> 
License: BSD 3-Clause 
License file included at: assets/vendor/highlightjs/LICENSE

Simple Code Block Highlighter

Enhances WordPress code blocks with line numbers, copy functionality, automatic syntax highlighting, and light or dark themes.

tcstix

<a href="https://www.tonyherman.com/code-copy-button-wordpress-plugin/" rel="nofollow ugc">Live Demo</a>
Make it easy for your readers and users to copy code snippets directly from your website. The Code Block Copy Button plugin adds a handy copy button to all code blocks, helping developers, tech writers, and educators improve user experience.
Features: 
– Automatically adds a Copy button to all <code><pre></code> code blocks, including Gutenberg Code and Preformatted blocks. 
– Customize the button text (e.g., “Copy”, “Copy Code”). 
– Change the button color to match your site’s theme. 
– Clean, modern SVG icon included in the button. 
– Simple settings panel under Settings > Code Block Copy. 
– Works with both Classic and Gutenberg editors. 
– Includes an optional promotional banner in the admin panel.<a href="https://www.tonyherman.com/code-copy-button-wordpress-plugin/" rel="nofollow ugc">Live Demo</a>
Make it easy for your readers and users to copy code snippets directly from your website. The Code Block Copy Button plugin adds a handy copy button to all code blocks, helping developers, tech writers, and educators improve user experience.
Features: 
– Automatically adds a Copy button to all <code><pre></code> code blocks, including Gutenberg Code and Preformatted blocks. 
– Customize the button text (e.g., “Copy”, “Copy Code”). 
– Change the button color to match your site’s theme. 
– Clean, modern SVG icon included in the button. 
– Simple settings panel under Settings > Code Block Copy. 
– Works with both Classic and Gutenberg editors. 
– Includes an optional promotional banner in the admin panel.<a href="https://www.tonyherman.com/code-copy-button-wordpress-plugin/" rel="nofollow ugc">Live Demo</a>
Make it easy for your readers and users to copy code snippets directly from your website. The Code Block Copy Button plugin adds a handy copy button to all code blocks, helping developers, tech writers, and educators improve user experience.
Features: 
– Automatically adds a Copy button to all
<
pre> code blocks. 
– Customize the button text (e.g., “Copy”, “Copy Code”). 
– Change the button color to match your site’s theme. 
– Simple settings panel under Settings > Code Block Copy. 
– No coding required – just install, configure, and you’re done. 
– Includes an optional affiliate link banner in the admin to help support development.
<h3>License</h3>
This plugin is licensed under the GPL2 license. See https://www.gnu.org/licenses/gpl-2.0.html for details.
Add a customizable copy button to code blocks for fast, one-click copying.
<h3>License</h3>
This plugin is licensed under the GPL2 license. See https://www.gnu.org/licenses/gpl-2.0.html for details.
Add a customizable copy button to code blocks for fast, one-click copying.
<h3>License</h3>
This plugin is licensed under the GPL2 license. See https://www.gnu.org/licenses/gpl-2.0.html for details.

Code Block Copy Button

Add a customizable copy button to code blocks for fast, one-click copying.

Simple Code Block Highlighter vs Code Block Copy Button