Hardik

SmoothTOC automatically generates a Table of Contents for your posts and pages based on your chosen headings (H2, H3, etc). You can insert the TOC automatically (top or after first paragraph) or manually using the [smooth_toc] shortcode. The plugin is highly customizable, translation-ready, and built to meet WordPress.org review standards.
<h4>Features</h4>
<ul>
<li>Automatic TOC generation: Creates a table of contents based on your post’s headings</li>
<li>Customizable appearance: Change colors, font size, and width</li>
<li>Flexible placement: Insert TOC at the top or after the first paragraph</li>
<li>Heading selection: Choose which heading levels to include (H1-H6)</li>
<li>Shortcode support: Use [smooth_toc] anywhere in your content for manual placement</li>
<li>Per-post control: Enable/disable TOC for individual posts</li>
<li>Mobile-friendly: Responsive design that works on all devices</li>
<li>Translation-ready: Fully translatable using WordPress translation system</li>
</ul>
<h4>Usage</h4>
<ol>
<li>Install and activate the plugin</li>
<li>The TOC will automatically appear in your posts and pages</li>
<li>Configure your settings under Settings > SmoothTOC</li>
<li>(Optional) Use the [smooth_toc] shortcode in your posts/pages for manual TOC placement</li>
</ol>

SmoothTOC

Automatically generates a Table of Contents for your posts and pages.

Stefan Matei

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.
You will be able to select one of the following two options (the first one being the default):
<ul>
<li>
My subheadings start from the H2 level: turn them down a level on archive pages. 
H2’s become H3’s, H3’s become H4’s, H4’s become H5’s, H5’s become H6’s and H6’s become paragraphs
</li>
<li>
My subheadings start from the H3 level: turn them up a level on single posts or pages. 
H3’s become H2’s, H4’s become H3’s, H5’s become H4’s and H6’s become H5’s
</li>
</ul>
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 be back to normal.
Visit the <a href="http://www.vileworks.com/correct-my-headings" title="Correct My Headings" rel="nofollow ugc">plugin page</a> on VileWorks.com.

Correct My Headings

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).

SmoothTOC vs Correct My Headings