Chathurya Wijerathna

Fmtify automatically converts images uploaded to your WordPress media library into modern WebP and AVIF formats. Serve smaller, faster images with zero manual work.
Features:
<ul>
<li>Automatic conversion on upload</li>
<li>WebP and/or AVIF output</li>
<li>Multiple conversion backends: GD, Imagick, cwebp, cavif</li>
<li>Bulk convert your existing media library</li>
<li>Apache .htaccess rewrite rules for seamless serving</li>
<li>Nginx configuration snippet for manual setup</li>
<li>Compatibility wizard to detect server capabilities</li>
</ul>

Fmtify: Auto WebP and AVIF Converter

Automatically converts your media library images to WebP and AVIF for faster page loads.

Gennady Kovshenin

Dugonja

This plugins embeds image links in comments with the img tag so the image are visible in your comment timeline.
Image formats supported: 
1. .jpg 
2. .gif 
3. .png
You can specify your comment width so the images are fitted nicely. Images are not hosted on your server neither this plugin pickups any data.
Do note that people can link extremely large images and your page loading can be compromised because of that.
Demo: 
<a href="http://www.ascic.net/embed-comment-images/" title="Embed Images in Comments" rel="nofollow ugc">Embed Comment Images</a>

Embed Images in Comments

Plugin contains a security issue. Do not use right now.

Updated: very simple and to the point :)

Simple

Embed direct image links in your comments with an img tag.

Fmtify: Auto WebP and AVIF Converter vs Embed Images in Comments