regen

<p>This plugin compresses javascript files and CSS files loaded by the theme or other plugins automatically.<br />
Extra spaces, lines, and comments will be deleted.<br />
The compressor is based on <a href="http://code.google.com/p/jscsscomp/" rel="nofollow ugc">jscsscomp</a>.</p>
<h4>Features</h4>
<ul>
<li>Auto-compression for the blog header.</li>
<li>Template tags which provide javascript compression.</li>
<li>You can turn on/off compressions in the admin page.</li>
<li>Editable CSS compression condition.</li>
<li>You can select where to output scripts.</li>
<li>You can exclude scripts from the compression if necessary.</li>
</ul>


Script Compressor

This plugin compresses javascript files and css files.

KeyCDN

<h4>WordPress Image Optimizer</h4>
<p>Optimus reduces the file size of uploaded media files automatically. Depending on the image and format, reductions in size of up to 70% are possible. Several kilobytes can be saved per image—these savings contribute positively to the performance of the blog website. What’s most impressive about the compression technology: the quality of the images is maintained.</p>
<blockquote>
<h4>There are three different versions of Optimus:</h4>
<ol>
<li><strong>Optimus</strong> <em>(Free)</em> as base version with limitations (e.g. max of 100kb)</li>
<li><strong>Optimus HQ</strong> <em>(Premium)</em> with expanded functionality for personal projects</li>
<li><strong>Optimus HQ PRO</strong> <em>(Premium)</em> as professional solution for customer websites</li>
</ol>
</blockquote>
<p>More details about the features and the pricing model on <a href="https://optimus.io" rel="nofollow ugc">optimus.io</a></p>
<h4>How does it work?</h4>
<p>During the uploading process of images to the media library, the <em>Optimus</em> plugin simultaneously sends the images to the <em>Optimus</em> server, where the incoming material is processed and sent back in optimized form. Afterwards, the <em>Optimus</em> plugin saves the image version with a reduced file size in the media library.</p>
<p>The optimization of images – <em>including thumbnails</em> – is conducted in the background and outside of the view of the user. The image compression gains per file are displayed by Optimus within the media library in form of a percentage value, see <a href="https://wordpress.org/plugins/optimus/screenshots/" rel="ugc">screenshot</a>.</p>
<p>Superfluous information that is saved by image processing programs and is not even necessary for displaying the image is extracted from image files. This way, the quality of the graphics remains intact while the image size can be reduced significantly. If you wish, Optimus keeps all author, EXIF and copyright information contained within the photos — the compressional gains will be correspondingly lower.</p>
<p>Optimus supports the conversion of images to the new <a href="https://www.keycdn.com/blog/convert-to-webp-the-successor-of-jpeg" rel="nofollow ugc"><em>WebP</em> image format</a>.</p>
<blockquote>
<p>It is recommended to use the <a href="https://wordpress.org/plugins/cache-enabler/" rel="ugc">WordPress Cache Enabler</a> plugin to integrate the converted WebP images.</p>
</blockquote>
<h4>Features</h4>
<ul>
<li><a href="https://www.keycdn.com/support/optimus/progressive-jpeg" rel="nofollow ugc">Progressive JPEGs</a></li>
<li>Reduction of file size during the upload</li>
<li>Optimization of all preview images of a photo</li>
<li>No adjustments to code necessary</li>
<li>Optional: no removal of EXIF and IPTC metadata</li>
<li>Optional: HTTPS connection for the image transfer (Optimus HQ)</li>
<li>Optional: <a href="https://www.keycdn.com/support/optimus/configuration-to-deliver-webp" rel="nofollow ugc">conversion to the WebP</a> image format (Optimus HQ)</li>
<li>Faster load times for blog pages</li>
<li>Support for WooCommerce</li>
<li>WordPress multisite-support</li>
<li><a href="https://www.keycdn.com/support/optimus/image-bulk-optimization" rel="nofollow ugc">Bulk optimization</a> (optimize existing images)</li>
</ul>
<h4>Privacy</h4>
<ul>
<li>After the image optimization and transfer process, the <em>Optimus</em> server immediately deletes all the temporarily stored files. No files are stored!</li>
<li>The Optimus servers are located in Germany.</li>
</ul>
<h4>Tips</h4>
<ul>
<li>Photos should always be saved as JPEGs rather than PNGs. The PNG format works well for illustrations, JPEG on the other hand is the right choice for photographs. Another reason: the size reduction always works more quickly for JPEGs.</li>
<li>Your images have been optimized using Desktop tools such as ImageOptim (Mac) or PNGGauntlet (Win) before you upload them? Optimus has the significant benefit of also minimizing the thumbnails (=preview images) created by WordPress. After all, themes almost always integrate thumbnails rather than original images.</li>
</ul>
<h4>System Requirements</h4>
<ul>
<li>PHP >=5.6</li>
<li>WordPress >=4.6</li>
<li>Allow outbound connections</li>
</ul>
<h4>Storage Utilization</h4>
<ul>
<li>Backend: ~ 0,19 MB</li>
<li>Frontend: ~ 0,01 MB</li>
</ul>
<h4>Website</h4>
<ul>
<li><a href="https://optimus.io" rel="nofollow ugc">optimus.io</a></li>
</ul>
<h4>Author</h4>
<ul>
<li><a href="https://www.keycdn.com" title="KeyCDN" rel="nofollow ugc">KeyCDN</a></li>
</ul>


Optimus – WordPress Image Optimizer

Effective image compression and optimization during the upload process. Smart, automatic and reliable.

Script Compressor vs Optimus – WordPress Image Optimizer