SubZtep

This plugin finds every GIF animation in your posts and replace it to a preview image. Doesn’t matter the GIF embedded from another website or use WordPress’s static thumbnail. It automatically generates the preview image from the first frame of the animation and save it to the post’s media directory with <code>-gap.jpg</code> suffix.
Posts show the pregenareted small size jpeg file first, your visitors don’t need to wait for download the huge animation. Play animation after they click on the image or after your whole page has downloaded. It depends on your setting:
<ul>
<li>You are able to stop animations everywhere</li>
<li>Or start animation automatically only inside a post</li>
<li>Or start the moves everywhere by default, use this plugin for lazyload</li>
</ul>
There are additional settings:
<ul>
<li>Pretty smooth effect between your preview and animation</li>
<li>Start animations with your mouse</li>
<li>Work with metadata and preview</li>
<li>Disable on certain images with <code>nogap</code> class</li>
</ul>
Don’t worry, delete this plugin will remove all settings from your database. Generated preview images gonna stay there, you can use them everywhere until you delete them manually.
On GitHub: 
https://github.com/SubZtep/gif-animation-preview

GIF Animation Preview

Works as advertising, and the code is really tight, too. Nicely done.



Fantastic plugin

cool

Replace GIF animations to a static preview image

Diego Betto

Simple plugin that renders a checkerboard under PNG and GIF images so you can see alpha channel

Media Checkerboard

Simple backend plugin that renders a checkerboard under PNG and GIF images so you can see alpha channel

GIF Animation Preview vs Media Checkerboard