Greg - SiteOrigin

A lot of themes ship with Timthumb because it allows their users to start using the theme without rebuilding thumbnails.
Secure Image Resizer offers a far more secure alternative. It allows theme developers to rely on WordPress’ own image resizing functionality using <code>add_image_size</code> and <code>get_the_post_thumbnail</code>.
When get_the_post_thumbnail is called, Secure Image Resizer checks if the requested image size exists. If the image doesn’t exist it dynamically creates the resized version. It works in the background, with no front end functionality.
Theme developers can either bundle this plugin into their themes, or suggest that their users install it.
It also includes 2 functions <code>so_resize_custom</code> and <code>so_resize_custom_html</code> to do dynamic image resizing using Imagick. Great for theme developers.
Please Note: This is an early release of Secure Image Resizer. Please use it, try and break it and report any bugs to me support@siteorigin.com so I can quickly fix them and work towards version 1.0.

Secure Image Resizer

A very simple and secure image resizer. It adds dynamic resizing so you don't need to regenerate thumbnails when you install a new theme.

ShortPixel

A free, fast, easy to use, stable and frequently updated plugin to resize your images after upload. Supported by the friendly team that created <a href="https://wordpress.org/plugins/shortpixel-image-optimiser/" rel="ugc">ShortPixel</a> 🙂
This plugin automatically resizes images (JPEG, GIF, and PNG) when they are uploaded to within a given maximum width and/or height to reduce server space usage, speed up your website, save you time and boost your site’s SEO. 
Imagine that nowadays images can be over 4-5MB and using this plugin you can reduce them to 100-200KB with no extra effort on your side!
In addition, the plugin can force the re-compression of uploaded JPEG images and convert PNGs to JPEG (if they don’t have a transparency layer), regardless of whether they are resized or not.
Is that simple, just give it a try, it is safe and free! 🙂
Other plugins by <a href="https://shortpixel.com" rel="nofollow ugc">ShortPixel</a>:
<ul>
<li><a href="https://wordpress.org/plugins/fastpixel-website-accelerator/" rel="ugc">FastPixel Caching</a> – WP Optimization made easy</li>
<li><a href="https://wordpress.org/plugins/shortpixel-image-optimiser/" rel="ugc">ShortPixel Image Optimizer</a> – Image optimization & compression for all the images on your website, including WebP & AVIF delivery</li>
<li><a href="https://wordpress.org/plugins/shortpixel-adaptive-images/" rel="ugc">ShortPixel Adaptive Images</a> – On-the-fly image optimization & CDN delivery</li>
<li><a href="https://wordpress.org/plugins/enable-media-replace/" rel="ugc">Enable Media Replace</a> – Easily replace images or files in Media Library</li>
<li><a href="https://wordpress.org/plugins/regenerate-thumbnails-advanced/" rel="ugc">reGenerate Thumbnails Advanced</a> – Easily regenerate thumbnails</li>
<li><a href="https://wordpress.org/plugins/wp-svg-images/" rel="ugc">WP SVG Images</a> – Secure upload of SVG files to Media Library </li>
</ul>
Get in touch!
<ul>
<li>Email <a href="https://shortpixel.com/contact" rel="nofollow ugc">https://shortpixel.com/contact</a></li>
<li>Twitter <a href="https://twitter.com/shortpixel" rel="nofollow ugc">https://twitter.com/shortpixel</a></li>
<li>Facebook <a href="https://www.facebook.com/ShortPixel" rel="nofollow ugc">https://www.facebook.com/ShortPixel</a></li>
<li>LinkedIn <a href="https://www.linkedin.com/company/shortpixel" rel="nofollow ugc">https://www.linkedin.com/company/shortpixel</a></li>
</ul>

Resize Image After Upload


Unfortunately, Wordpress administrators do not deal with this at all, and all it takes is one careless editor and the administrator has a lot to do for many hours. With this plugin, servers are no longer filled with unnecessary giant images that are ultimately useless and just lie dead on the server and take up space. Lots of space.


Thanks for fixing the big images issue

Automatically resize your images after uploading using this plugin. Specify height&width, the plugin will do the rest quickly and transparently.

Secure Image Resizer vs Resize Image After Upload