Katsushi Kawamori

<h4>Compress PNG files</h4>
<ul>
<li>Compress PNG files when adding PNG files in Media Library. </li>
<li>Quality can be specified.</li>
<li>Compress can be specified.</li>
</ul>
<h4>Note</h4>
<p>This has no effect on files compressed with TinyPNG. Also, you can’t expect to get the excellent compression and image quality that TinyPNG provides.</p>


Png Compress

alpipego

<p>Instead of creating image sizes on upload, this plugin only creates them when requested.</p>
<p>Normally after activating a new theme or plugin that adds new image sizes, you will have to use a tool like <a href="https://wordpress.org/plugins/regenerate-thumbnails/" rel="ugc">Regenerate Thumbnails</a> to create the newly registered image sizes. Depending on the size of the media library and the “power” of your server, this might take a while or even take several tries to process all your images; and in the end, you don’t even know if you’ll need all of the resized images.</p>
<p>This plugin takes care of the resizing dynamically and creates the requested size the moment it is first requested—and only when it is requested.</p>
<h4>Support</h4>
<p>For users: Please use the support forums on <a href="https://wordpress.org/support/plugin/resizefly" rel="ugc">wordpress.org</a><br />
For developers: Head over to the <a href="https://github.com/alpipego/resizefly/" rel="nofollow ugc">Github repository</a><br />
For everything else, find me on <a href="https://twitter.com/alpipego" rel="nofollow ugc">twitter</a> or on slack</p>


ResizeFly

Nice idea!

Dynamically resize your WordPress images on the fly. Upload them once and don't worry about missing or new image sizes.

Png Compress vs ResizeFly