Alvaro

<a href="https://gutenberg-showcase.melonpan.io/melonpan-block-code" rel="nofollow ugc">Demo</a> – <a href="https://melonpan.io/wordpress-plugins/melonpan-block-code" rel="nofollow ugc">Documentation</a> – <a href="https://github.com/garciaalvaro/melonpan-block-code" rel="nofollow ugc">GitHub</a>
Block to display code, with highlighted syntax, which can be copied to the clipboard.
<h3>Features</h3>
The block comes with the following settings:
<ul>
<li>Code language: JavaScript, CSS, PHP, etc. <a href="https://prismjs.com/#languages-list" rel="nofollow ugc">Full list of languages</a>.</li>
<li>Color theme</li>
<li>Label: Top left label that can be customized. By default the code language.</li>
<li>Copy button: Top right button to copy the block content.</li>
<li>Padding</li>
<li>Border width and Border radius</li>
</ul>
<h3>Usage</h3>
The block can be found inside the blocks inserter menu under the Melonpan Blocks category. 
Once added in the post you can edit its settings on the Editor sidebar under the Block settings panel. 
Switch between the previewer and editor views to edit the code and see its styled output.

Melonpan Block – Code

Block to display code, with highlighted syntax, which can be copied to the clipboard.

Raunak Gupta

Vaaky Highlighter is a lightweight syntax highlighter plugin for the WordPress Gutenberg editor. Add beautiful code blocks with line numbers, a copy-to-clipboard button, optional filename label, automatic language detection, and 35+ themes. Powered by Highlight.js — a fast, dependency-free alternative to Prism.
Syntax highlighting is powered by Highlight.js, a fast and dependency-free JavaScript library that supports multiple programming languages and themes.
Vaaky Highlighter is ideal for developers, bloggers, technical writers, and documentation sites who want elegant syntax-highlighted code without unnecessary bloat.
Using it is simple: add the Vaaky Highlighter Sourcecode block in Gutenberg, paste your code, and publish — the plugin handles everything automatically.
View the live demo of all supported themes: 
<a href="https://www.webhat.in/?page_id=626&utm_source=wordpress.org&utm_medium=readme.txt&utm_campaign=link&utm_id=vaaky_highlighter&utm_term=Theme+Demo" rel="nofollow ugc">Demo Page</a>
<h3>What’s new in 1.2.0</h3>
<ul>
<li>Line numbers for code blocks</li>
<li>Floating copy-to-clipboard button on every block</li>
<li>Optional filename label (renders as a tab above the code)</li>
<li>Word-wrap toggle per block + global default</li>
<li>Visual theme picker (no more guessing from a dropdown)</li>
<li>Modernized build using @wordpress/scripts</li>
<li>Drops PHP 5.6 / WordPress 6.0 support — now requires PHP 7.4 / WordPress 6.5</li>
</ul>
<h3>Usage</h3>
<ol>
<li>Add the Vaaky Highlighter block in the Gutenberg editor</li>
<li>Paste or write your code</li>
<li>Select a language (optional)</li>
<li>Save and view your page on the frontend</li>
</ol>
<h3>Supported Languages</h3>
<ul>
<li>Apache</li>
<li>Bash</li>
<li>C</li>
<li>C#</li>
<li>C++</li>
<li>CSS</li>
<li>DNS Zone file</li>
<li>DOS</li>
<li>Django</li>
<li>Dockerfile</li>
<li>Go</li>
<li>HTML / XML</li>
<li>Handlebars</li>
<li>JSON</li>
<li>Java</li>
<li>JavaScript</li>
<li>Markdown</li>
<li>Nginx</li>
<li>Objective-C</li>
<li>PHP</li>
<li>Plaintext</li>
<li>PostgreSQL & PL/pgSQL</li>
<li>PowerShell</li>
<li>Python</li>
<li>R</li>
<li>Ruby</li>
<li>Rust</li>
<li>SCSS</li>
<li>SQL / MySQL</li>
<li>Shell</li>
<li>Twig</li>
<li>TypeScript</li>
<li>YAML / YML</li>
</ul>

Vaaky Highlighter — Syntax Highlighter, Code Blocks, Line Numbers for Gutenberg

Lightweight syntax highlighter with code blocks, line numbers, copy-to-clipboard, and 35+ themes. A fast, free alternative to Prism for WordPress.

Melonpan Block – Code vs Vaaky Highlighter — Syntax Highlighter, Code Blocks, Line Numbers for Gutenberg