This plugin will allow you to check your pages/posts HTML against the W3C Validator.
Soft hyphens are automatically added in the content for a nicer automatic word wrap. Particularly suitable for justification. Uses Hyphenator.js.
Easily post syntax-highlighted code to your site without having to modify the code at all. As seen on WordPress.com.
Open external links in a new window or tab, adding "nofollow", set link icon, styling, SEO friendly options and more. Easy install and go.
Protect your image from download as hard as we could.
A no-fuss, lightweight, fast and optimised syntax highlighter for WordPress
The phpHtmlLib library contains a set of PHP classes and library functions to help facilitate building, debugging, and rendering of XML, HTML, XHTML,
SmartAss Highlighter is extremely simple and easy to use syntax highlighter for your code. Shortcode - [highlighter]
Moves the gallery shortcode styles to the head so it doesn't break XHTML validation; allows disabling or modifying the default gallery styles.
This plugin branched from version 1.1.3 of QF-GetThumb. Added function and change configuration screen. Thank you Q.F. and QF-GetThumb. QF-GetThumb-w
Short Syntax Highlighter allows you to easily post syntax-highlighted code to your site without losing it's formatting or making any manual chang
WP Code Highlight provides clean syntax highlighting and it also provides a code button.
A nice Color Scheme for "SyntaxHighlighter Evolved" based on "Spacegray", the lovely Theme for Sublime Text 2/3.
A plugin to serve WordPress content using the application/xhtml+xml MIME type
Sends public sites with the XHTML mime type. The internal sites, which have many XHTML errors, are still sent with the HTML mime type.
Converts all character entity references, which are forbidden in XHTML, into their corresponding characters.
This plugin provides the ability to run HTML Tidy through all your posts, pages, and comments, generating a report on just how dirty your code is.
HTML Purified replaces the default comments filters with the more secure HTML Purifier.
Adds Gherkin/Cucumber/Behat syntax for SyntaxHighlighter Evolved.
Check the doctype validity using W3c validator (hml , xhtml, ...) when you create or update your page / post / custom post type and show the result in
This is a Advanced Business Application Programming (ABAP) brush for the "SyntaxHighlighter Evolved" plugin.
Beautifier provides several options to clean up WP's messy (X)HTML source code output, such as code indentation.
Fix the gallery so it validates XHTML and remove aria from default comment form. Plus other goodies!
Converts HTML tags 'b' and 'i' to 'strong' and 'em' within posts, pages, and comments, making them more accessible.
Easily post source code such as PHP or HTML and display it in a styled box.
This plugin makes the oEmbed code for YouTube Valid XHTML 1.0 Transitional.