Yes, WP-Validate is free to use. It is available as a free plugin on WordPress.org.

How many websites use WP-Validate?

WP-Validate has 10 active installations as tracked by WordPress.org.

What are the best WP-Validate alternatives?

Popular alternatives to WP-Validate include WPCode – Insert Headers and Footers +…, Code Snippets, Simple Custom CSS Plugin. You can compare them side-by-side on our comparison pages.

Does WP-Validate work with the latest WordPress?

WP-Validate has been tested up to WordPress 2.7. It requires WordPress 2.5+ and PHP false+.

WP-Validate — Reviews, Rating & Alternatives (2026)

As of April 2026, WP-Validate is a WordPress css plugin with 10 active installations and a 0/5 rating0. It has been downloaded 3.2K+ times in total. Requires WordPress 2.5+ and PHP false+. Available on WordPress.org since 2009. Last updated 17 years ago — may have compatibility concerns. Top alternative: WPCode – Insert Headers and Footers +….

0/5Rating

10active installs

3.2K+total downloads

17 yearssince 2009

Overview

WP-Validate indexes your site, collecting all the blog posts, pages and other published content, and submits it to the W3C’s HTML Validator, which then returns the response.

WP-Validate then lists the valid pages, and the invalid pages, with a link to the specific validator URL.

Read full description on WordPress.org