Andrew Parman

This plugin adds a Gutenberg block called <code>IECST Highlighter</code>. After entering a code snippet in the editor, 
the output will be rendered with a syntax highlighting style selected in the IECST Highlighter Settings.
This plugin uses the <a href="https://github.com/PhioAutomation/phio-highlighter" rel="nofollow ugc">Phio Highlighter</a> which is distributed 
with an MIT License, https://highlighter.phioautomation.com/LICENSE.txt.
Development of this plugin is on <a href="https://github.com/PhioAutomation/phio-highlighter" rel="nofollow ugc">Github</a>.

IECST Highlighter

Display beautiful code snippets using the Phio Highlighter for the IEC 61131-3 Structured Text language

garethgillman

This plugin prettifies/beautifies/highlights source code placed inside <code><pre class="prettyprint"></code> tags. It is a light plugin with only 2 files.
New in 3.2.2 – use the hammer icon in the editor to paste your code and automatically have it converted to pretty code.

Syntax Highlighter Lite

This plugin prettifies/beautifies/highlights source code placed inside `` tags. It is a light plugin with only 2 files.

IECST Highlighter vs Syntax Highlighter Lite