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.

modalweb

jaggskrist

Adds automatically alt attributes in image tag where alt attributes are missing or alt is empty. Just install plugin, it will automatically adds alt attribute to all images in your website. It will resolve alt missing issue. It will auto pick image name and assign it to missing alt attribute.
<h3>How to use</h3>
<ol>
<li>First Activate Plugin.</li>
<li>It will auto add alt attributes in image tag where alt attribute is missing or alt is empty.</li>
</ol>

Auto Image Alt Attribute

Reviewed on iThemes Training Plugin Roundup for May 2019.

Thanks for a nicely done plugin here that solves the problem of missing alt text quite well.

2 Suggestions... 

First, I believe many of us would appreciate you moving the menu item under settings where it belongs rather than having its own top-level menu. There's no need for that other than to promote your other plugins :) I'm all for promotion, but plugins with a single settings page don't need their own top level slot.

Second, if the image filename has dashes or underscores, those are also added to the alt text. It would be quite helpful if you could strip those out.

Thanks again for your good work here. I hope you'll consider my suggestions. Thanks!

Nice Plugin - but why its own menu link?

Adds automatically alt attributes in image tag where alt attributes are missing or alt is empty.

DP ALTerminator – Missing ALT manager vs Auto Image Alt Attribute