FractalizeR

Plugin provides syntax highlighting in posts and comments.
<ul>
<li>Full GUI mode. No need to switch to code mode and back like in some other plugins</li>
<li>GUI editor with realtime syntax highligting support integrated (can be disable in settings)</li>
<li>GUI button to help with highlighting options. No need to memorize them!</li>
<li>Blog-wide default settings for code highlighting. Now you can change the look of all your posts at once!</li>
<li>Many options to customize code highlighting (almost full Geshi set)</li>
</ul>
If you like this plugin, you can make a donation with WebMoney (R704473788938, R704473788938), Yandex.Money (41001122895969), MoneyBookers (FractalizeR@yandex.ru)
<h3>Usage</h3>
Just select all your source code in the editor and use editor button (preferred method) or surround your code directly in WYSIWYG editor with a [codesyntax] [/codesyntax] tag like this
[codesyntax lang=”php”]
<pre><code><?php 
//Replacing tags
$find [] = '/<br\s*\\?>/i';
$replace [] = "\r\n";
$content = preg_replace($find, $replace, $content);
?>
</code></pre>
[/codesyntax]
[filesyntax filename=”test.phps” lang=”php”]
The tag in the last example should be enabled in settings. See it’s description below also.
and you will get wonderful geshi formatting. Format all your source code with Preformatted style to preserve spaces.
If you need to change settings of already formatted block – select it all and press GUI editor button again. Plugin will recognize all settings you used.
Plugin recognizes several popular geshi options to render highlighting:
filename
The relative filename of the file inside a folder, allowed for [filesyntax] tag to take the source for highlighting from. Works only in [filesyntax] tag
lang
The programming language you want to be your source highlighted in. [codesyntax lang=”java”]My java code goes here…[/codesyntax] 
The name of the language should match the name of the highlighter file. For the list of all supported highlighters please look at /wp-content/plugins/wp-synhighlighter/geshi/geshi directory of your WordPress installation after installing this plugin. A list of currently support languages:
abap, actionscript, actionscript3, ada, apache, applescript, <code>apt_sources</code>, asm, asp, autoit, avisynth, bash, basic4gl, blitzbasic, bnf, boo, c, caddcl, cadlisp, cfdg, cfm, cil, cobol, cpp-qt, cpp, csharp, css, <code>c_mac</code>, d, delphi, diff, div, dos, dot, eiffel, email, fortran, freebasic, genero, gettext, glsl, gml, gnuplot, groovy, haskell, html4strict, idl, ini, inno, io, java, java5, javascript, kixtart, klonec, klonecpp, latex, lisp, list.txt, lotusformulas, lotusscript, lua, m68k, make, matlab, mirc, mpasm, mxml, mysql, nsis, objc, ocaml-brief, ocaml, oobas, oracle11, oracle8, pascal, per, perl, php-brief, php, pic16, plsql, povray, powershell, progress, prolog, python, qbasic, rails, reg, robots, ruby, sas, scala, scheme, scilab, sdlbasic, smalltalk, smarty, sql, tcl, teraterm, text, thinbasic, tsql, typoscript, vb, vbnet, verilog, vhdl, visualfoxpro, winbatch, xml, xorg_conf, xpp, z80
lines
Do you want line numbers to be visible? Possible parameter values are:
<ul>
<li>no – no line numbers. [codesyntax lang=”java” lines=”no”]My java code[/codesyntax]</li>
<li>normal = normal line numbering</li>
<li>fancy – fancy line numbering 
This parameter defaults to fancy</li>
</ul>
lines_start
You can provide this parameter if you want your line numbering to start with a custom value. [codesyntax lang=”java” lines=”fancy” lines_start=”1000″]My java code[/codesyntax]. Please don’t forget to enclose a value into quotes exactly like in example 
By default numbering starts with 1.
container
You can select container, that your code will be wrapped in
<ul>
<li>pre</li>
<li>div</li>
<li>pre_valid</li>
<li>pre_table</li>
<li>none</li>
</ul>
By default pre is used. [codesyntax lang=”java” container=”pre”]My java code[/codesyntax] 
More information can be found in <a href="http://qbnz.com/highlighter/geshi-doc.html#the-code-container" rel="nofollow ugc">Geshi documentation</a>
capitalize
Do you wish your keywords to be automatically capitalized or decapitalized?
<ul>
<li>no – don’t change anything</li>
<li>upper – convert all keywords into uppercase</li>
<li>lower – convert all keywords into lowercase 
By default no change is assumed 
[codesyntax lang=”java” capitalize=”upper” lines_start=”1000″]</li>
</ul>
tab_width
If you want to change tab width, use this parameter: [codesyntax lang=”java” tab_width=”10″]
strict
This setting enables or disables strict mode for formatting complex pieces of data. Please see <a href="http://qbnz.com/highlighter/geshi-doc.html#using-strict-mode" rel="nofollow ugc">Geshi documentation</a> to find out more on the subject
title (new in 0.91)
This attribute sets the header of the collapsable code block (“Code” by default)
bookmarkname (new in 0.91)
The name of bookmark (Named anchor tag <code><a name="bookmarkname" /></code>) you want to refer to this codeblock. By default it is 
 codesyntaxX, where X is 1 for first code block on the page, 2 for second etc. You can refer to your codeblocks using hyperlinks 
 < a href=”#codesyntax5″>Link to fifth code block on the page or, if you used 
 [codesyntax bookmarkname=”fifthcode”] lang=”php” bbcode, you can then refer to this codeblock as 
 < a href=”#fifthcode”>Link to fifth code block on the page
blockstate (new in 0.97) 
Sets initial code block state when the page is shown to user. It can be default, expanded or collapsed. Default corresponds to expanded currently.
highlight_lines (new in 1.1) 
Provides a comma-separated list of lines, that should be specially highlighted in the code
doclinks (new in 2.3) 
Enables or disables generation of documentation links for keywords

WP-SynHighlight

Plugin provides syntax highlighting for about 116 programming languages via Geshi.

Freemius

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Prosanta Roy

<a href="https://bplugins.com/products/code-snippets-block/" rel="nofollow ugc">Code Snippets Block</a> is a lightweight Gutenberg plugin that lets you display programming code in WordPress with syntax highlighting, copy-to-clipboard functionality, and customizable themes.
<a href="https://bplugins.com/products/code-snippets-block/" rel="nofollow ugc">Code Snippets Block</a> | <a href="https://bplugins.com/products/code-snippets-block/pricing/" rel="nofollow ugc">Pricing</a> | <a href="https://bplugins.com/support/" rel="nofollow ugc">Support</a> | <a href="https://bblockswp.com/demo/code-snippets-block-all-demo/" rel="nofollow ugc">Live Demos</a>
Perfect for developers, programmers, educators, technical writers, and bloggers, the plugin makes it easy to showcase code snippets, source code examples, developer documentation, programming tutorials, and technical guides in a clean and professional format.
Whether you’re sharing PHP, JavaScript, Python, HTML, CSS, JSON, SQL, or other programming languages, Code Snippets Block improves readability with syntax highlighting and allows visitors to copy code instantly with a single click.
Built specifically for WordPress and Gutenberg, the plugin is lightweight, responsive, SEO-friendly, and designed for modern developer-focused websites.
<h3>Key Features – Free Version</h3>
<ul>
<li>
One-Click Copy Button: Allow visitors to copy code instantly using a convenient copy-to-clipboard button.
</li>
<li>
Syntax Highlighting for Multiple Languages: Display programming code with proper syntax highlighting for better readability.
</li>
<li>
Seven Modern Color Themes: Choose from multiple built-in themes to customize the appearance of your code snippets.
</li>
<li>
Clean Code Presentation: Show code in a structured and readable layout that improves user experience.
</li>
<li>
Gutenberg Block Integration: Easily insert code snippets using a dedicated Gutenberg block.
</li>
<li>
Shortcode Support: Embed code snippets anywhere on your site using shortcodes.
</li>
<li>
Responsive Design: Code snippets automatically adapt to all screen sizes and devices.
</li>
</ul>
<h3>Code Snippets Block Pro – Unlock More Customization</h3>
Upgrade to the <a href="https://bplugins.com/products/code-snippets-block/pricing/" rel="nofollow ugc">Pro version</a> for additional layout and styling controls.
<h3>What’s Included in the Pro Version?</h3>
<ul>
<li>
Custom Copy Button Position: Place the copy button exactly where you want within the code block.
</li>
<li>
Premium Header Layouts: Use advanced header layouts to enhance the code snippet design.
</li>
<li>
Exclusive Premium Themes: Access additional professionally designed color themes.
</li>
<li>
Header Padding & Background Control: Adjust spacing and background styles for the code block header.
</li>
<li>
Custom Code Block Background: Apply custom background styles for better visual presentation.
</li>
<li>
Formatted Output Section: Display formatted output along with the code snippet.
</li>
</ul>
Try the <a href="https://bplugins.com/products/code-snippets-block/pricing/" rel="nofollow ugc">Code Snippets Block</a> – Unlock all premium features now!
<h3>How to Use Code Snippets Block – Step-by-Step Guide</h3>
Getting started with the Code Snippets Block is quick and easy!
<h3>Step-by-Step Instructions</h3>
<ol>
<li>
Install and activate the Code Snippets Block plugin.
</li>
<li>
Open the Gutenberg editor in WordPress.
</li>
<li>
Add the Code Snippets Block from the block inserter.
</li>
<li>
Paste your code into the block.
</li>
<li>
Select the programming language and theme from the block settings.
</li>
</ol>
Your code snippet will now appear with syntax highlighting and a copy button.
<ul>
<li>For installation help click on Installation Tab.</li>
</ul>
<a href="https://bblockswp.com/demo/code-snippets-block-all-demo/" rel="nofollow ugc">Live Demos</a> | <a href="https://bplugins.com/products/code-snippets-block/pricing/" rel="nofollow ugc">Get Code Snippets Block PRO</a>
<h3>Why Choose Code Snippets Block?</h3>
<ul>
<li>Instant copy-to-clipboard — visitors copy your code in one click</li>
<li>Syntax highlighting for all major languages — PHP, JavaScript, Python, HTML, CSS, and more</li>
<li>7 built-in color themes — match your site’s look and feel</li>
<li>Gutenberg-native — inserts just like any other block</li>
<li>Shortcode support — embed code snippets anywhere on your site</li>
<li>Fully responsive — looks great on desktop, tablet, and mobile</li>
<li>Lightweight — minimal impact on page load speed</li>
<li>Works with any WordPress theme — zero compatibility issues</li>
</ul>
<h3>Common Use Cases</h3>
The plugin is useful for many types of WordPress websites:
✔ Programming Tutorials: Make your snippets easy to read and copy. 
✔ Developer Documentation: Keep code examples clean and consistent. 
✔ Developer Portfolios: Showcase your clean code with pride. 
✔ Technical knowledge bases. 
✔ Educational coding resources.
<h4>Feedback</h4>
<ul>
<li>Liked that plugin? Hate it? Want a new feature? <a href="mailto:support@bplugins.com" title="Send feedback" rel="nofollow ugc">Send me some feedback</a></li>
</ul>
<h4>⭐ Check out the Parent Plugin of this plugin-</h4>
🔥 <a href="https://bblockswp.com/" rel="nofollow ugc">b Blocks</a> – Best gutenberg blocks collections for WordPress.
<h4>⭐ Check out our other WordPress Plugins-</h4>
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🔥 <a href="https://3d-viewer.bplugins.com/" rel="nofollow ugc">3D Viewer</a> – Display interactive 3D models on the webs.

Code Block – Embed Code with One-Click Copy Feature

Display beautifully highlighted code snippets on your WordPress site with a one-click copy feature. Fully responsive and Gutenberg compatible.

WP-SynHighlight vs Code Block – Embed Code with One-Click Copy Feature