Question 1

What is the best WordPress Markup Validation plugin?

Accepted Answer

The most widely used markup validation plugins are ranked by active installations on PluginSift. You can sort by popularity, rating, or recent updates to find the best option for your needs. As of April 2026, there are 2 markup validation plugins available.

Question 2

How many WordPress Markup Validation plugins are there?

Accepted Answer

As of April 2026, there are 2 WordPress markup validation plugins listed on PluginSift. This includes free, freemium, and premium options from various developers.

Question 3

Are there free Markup Validation plugins for WordPress?

Accepted Answer

Yes, the majority of WordPress markup validation plugins offer a free version. Many also have premium tiers with advanced features. You can use the filter options above to browse only free plugins.

Question 4

How do I compare Markup Validation plugins?

Accepted Answer

PluginSift lets you compare any two plugins side by side. Visit a plugin page and click "Compare", or use the Compare tool in the navigation. Comparison pages show ratings, active installations, support quality, update frequency, and more.

WordPress Markup Validation Plugins

HTML Validation

Batch Validator

Frequently Asked Questions