mylo2h2s

DP ALTerminator adds missing or empty ALT tags to your content images.
Thanks to various shortcodes such as <code>%%DP_TITLE%%</code> or <code>%%DP_DATE%%</code> it’s pattern can be easily customized (you can mix plain text elements with shortcodes to create complex patterns)
DP ALTerminator works when ALT tags are missing or when they are empty. Sometimes WordPress itself, visual editors, and so on, leave an ugly <code>alt=""</code> which is useless and not always recognized by other famous ALT tag managers.
DP ALTerminator works only with content images ($content variable), because I didn’t want to alter “extra” images, like widgets, logos, menu icons and so on (most of the times, you want to manually edit their ALT or leave it empty)

DP ALTerminator – Missing ALT manager

Adds ALT tags to your content images when they're missing or empty. It's pattern can be customized with simple shortcodes.

webriti

The SEO Optimized Images plugin lets you dynamically insert SEO-Friendly “alt” and “title” attributes to your images. Simply activate the plugin, provide the pattern, and you are ready to go.
The plugin dynamically replaces the “alt” and “title” tags. It does not make any changes to the database. This means that if you deactivate the plugin, everything will return to the original settings. 
With the plugin, you can insert an image name, a post title and a post category in the “title” and “alt” attributes of the image. 
Give SEO Optimized Images a try: we are sure you will like it!
In case you face any problem, contact us via the <a href="https://wordpress.org/support/plugin/seo-optimized-images" rel="ugc">Forums</a>.
<h4>GDPR-compliant</h4>
The plugin does not collect, store and share any user data, and is therefore GDPR-compliant.
<h4>Premium Version Features</h4>
★ Support for Featured Images 
 ★ Support for Woocommerce Product Images 
 ★ Support for Custom Post Type Images 
 ★ Custom Rules selectively add alt and title tags to images based on custom rules. 
 ★ 1 Year Support and Updates 
 ★ Support for popular page builders like Elementor, Site Origin etc
<h4>**Upgrade to pro**</h4>
Follow link to purchase premium version
<a href="http://webriti.com/seo-optimized-images" rel="nofollow ugc">Upgrade to the Seo Optimized Images Pro Version »</a>
<h3>External Resources</h3>
OptionTree Font: 
Copyright: (c) Derek Herman 
License: GNU General Public License v2.0 
Source: https://github.com/valendesigns/option-tree/blob/master/assets/css/ot-admin.css

Seo Optimized Images

Plugin is very light weight and ensure that images always have relevant alt tags.  

Adding alt tags is a great way to get additional traffic and this plugin makes it a breeze.

Light and Effective

The SEO Optimized Images plugin lets you dynamically add SEO-Friendly "alt" and "title" attributes to your images.

DP ALTerminator – Missing ALT manager vs Seo Optimized Images