Joerie van Overbeeke

Rowan van Zijl

Try the plugin in <a href="https://tastewp.org/plugins/resize-control" rel="nofollow ugc">sandbox mode</a>.
Auto resize and compress all your future uploads. Automate all your media resolutions and sizes for you and your wp accounts to save time, site speed, SEO score, disk space and bandwidth. This is a free and easy-to-use plugin that updates frequently. Created by the team behind <a href="https://www.runningwombat.com/tools/image/" rel="nofollow ugc">Running Wombat</a>.
<h3>Features</h3>
<ul>
<li>Automatically optimize all future uploads.</li>
<li>Set maximum image dimensions.</li>
<li>Convert PNGs to JPGs.</li>
<li>Set compression level from 0 to 10 (also for PNG).</li>
<li>Ignore roles for all set resize settings.</li>
<li>Don’t leave unnecessary files on the server.</li>
<li>No change in the upload process at all.</li>
<li>Easy setup.</li>
</ul>
<h3>Try our PRO version</h3>
The Pro version of Resize Control offers advanced features such as:
<ul>
<li>Customize resize control per post type, allowing for different settings for products, blogs, etc.</li>
<li>Convert any image automatically to JPG or WEBP, not just PNG to JPG.</li>
<li>Choose between different resize methods: cover, contain, fill, and scale down.</li>
<li>Set default background colors for resizing.</li>
</ul>
Find it here <a href="https://tuningwp.com/resize-control/" rel="nofollow ugc">Resize control PRO</a>
Do you have a question or suggestion
Contact support <a href="https://tuningwp.com/my-account/support/" rel="nofollow ugc">https://tuningwp.com/support/</a>
<h3>Sources</h3>
<ul>
<li><a href="https://github.com/Donaldcwl/browser-image-compression" rel="nofollow ugc">Browser image compression</a> – Includes the uncompressed files for the browser compression library.</li>
</ul>

Resize Control – Compress and resize images after upload

Auto resize, optimize images; ensure compression for WP accounts to save time, speed, space, and bandwidth.

riotweb

About
This plugin will instantly speed up your WordPress website when the plugin is activated. 
Gzip is the most popular and effective compression method currently available and generally reduces the response size by about 70%!
Important 
This function changes your .htaccess file. In some cases this might result in a 500 error. If you’re not sure whether you can run Gzip ask your hosting company. 
The only way to fix this is to be able to edit the .htaccess file from outside WordPress (via FTP).
Gzip Checker 
NEW – You can now check if Gzip is enabled for your website. Go to “settings” and select the “Instant Gzip Compression” tab.

Instant Gzip Compression

Speed up your Wordpress website with this Gzip compression plugin.

Resize Control – Compress and resize images after upload vs Instant Gzip Compression