Best markup validation plugins for WordPress
The most popular markup validation plugins for WordPress in November 2026, in WordPress.org’s own popular order, which follows active installs. HTML Validation leads with 300+ active installs, ahead of Batch Validator (10+). All 2 plugins tagged “markup validation” are below, with figures from WordPress.org that update every day.
Installs aren’t everything: a recent release, a “Tested up to” that matches the current WordPress, and support threads that get resolved show a plugin is looked after. Open any plugin for its downloads, rank history and alternatives.
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Top 2 markup validation plugins
- 1.
HTML ValidationThe most installed markup validation plugin, with 300+ active installs. Only 1 review so far, updated 2 months ago.
- 2.
Batch Validator10+ active installs. No reviews yet, last updated 19 years ago. Tested only up to WordPress 2.2.2.
All 2 plugins tagged “markup validation”
HTML Validation
Up in the last 7 days:30#10,006by seshelby2 months ago
The HTML Validation Plugin runs in the background, identifies and reports HTML validation errors on your website. Once activated, the HTML Validation …
- Installs
- 300+
- Rating
- 1.0(1)
- Downloads
- 6/day
Batch Validator
Down in the last 7 days:3,629#47,457by Roland Rust19 years ago
This plugin performs a batch markup validation check over your entire WordPress website.
- Installs
- 10+
- Rating
- –
- Downloads
- 0/day