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

danfinkler

jkim

Add some flava to your blog with the Giphy WordPress plugin!! Animated GIFs are a proven way to improve 
traffic, increase time on site, and promote sharing on social media platforms. Don’t take our word for it, 
blogs have already utilized Giphy GIFs to boost the popularity of their posts.
Adding a GIF with the Giphy plugin couldn’t be easier. Just click the Giphy logo button in the text editor, 
search or browse via tags to find GIFs, and click on a GIF to get a better view. Once you’ve found the GIF you 
want, simply click the “Embed into Post” button, and, voila!, the GIF is automatically inserted into your 
post.

Giphypress

The official GIPHY plugin allows you to embed awesome GIFs into your WordPress posts with ease.

GIF Animation Preview vs Giphypress