This plugin will allow you to check your pages/posts HTML against the W3C Validator.

Allan Collins 1,000+ active installs Tested with 4.4.10 Updated 2 years ago

W3C validation auto check

Automatically checks the validity of the page with the service provided by the site

Tammax 300+ active installs Tested with 3.3.2 Updated 5 years ago

Push up the Web for WordPress

When people visit your website using an outdated browser, a subtle upgrade link is shown…

Francois Botha 100+ active installs Tested with 3.1.4 Updated 6 years ago

(x)html easy validator

Check the doctype validity using W3c validator (html , xhtml , … ) when creating…

Nicolas ANDRÉ AKA Nikoya 70+ active installs Tested with 3.2.1 Updated 6 years ago

DT's Debugger

Simplify page debugging via Facebook Developer Tools, Google's Structured Data Testing Tool, PageSpeed Insights, W3C…

Michael R. Dinerstein 50+ active installs Tested with 4.8 Updated 5 months ago


WP-Validate collects all the pages on your site and runs them through the W3C's HTML…

Jamie Rumbelow 40+ active installs Tested with 2.7 Updated 8 years ago

Ochre W3C Geolocation Services

Geolocation Services attempts to retrieve a visitor's physical location, allowing for geographically relevant content to…

Ochre Development Labs Fewer than 10 active installs Tested with 3.3.2 Updated 6 years ago

Batch Validator

This plugin performs a batch markup validation check over your entire WordPress website.

Roland Rust Fewer than 10 active installs Tested with 2.2.2 Updated 10 years ago