Free WordPress plugin: Correct My Headings
Type “correct my headings” and click the “Search Plugins” button in your WP Dashboard or download this plugin from the WordPress Plugin Directory.
If your subheadings appear on archive pages, they need to start from H3 (because H2 tags are used by the post titles on archive pages). This plugin dynamically corrects subheadings before they are displayed on your site — for SEO and semantic markup purposes. Depending on how you use headings in the text of your posts (you could have them starting from the H2 level or from the H3level) you will have a couple of options to choose from in the plugin’s settings page.
This plugin does not make any changes to your database: the subheadings will only be displayed differently on the front-end site. If you disable the plugin or decide to uninstall it everything will turn back to normal.
To install it type “correct my headings” and click the “Search Plugins” button in your WP Dashboard or download this plugin from the WordPress Plugin Directory.
If you have any questions or suggestions, please leave them in the comment section below.