Alexandru Vornicescu

This is a WordPress plugin.
If you want to resize images in your posts automatically so the page will load faster and use less bandwidth then this plugin can help you.
To take effect just open a post or page and all images in that post will be resized to a smaller version.
It will replace the URLs of the images that are too big with URLs of the resized images that will fit into the posts.
The plugin will keep the original copy of all image files.
Note: With version 4.3 now you can resize images in Text Widgets.
Note: The filter – “wp_make_content_images_responsive” will be deactivated because with this plugin we will not need anymore.

Resize Images In Posts

This plugin will resize images in your posts.

TMM Technology

A WordPress plugin for client-side uploaded images resize (to do it client-side instead of backend-side and minimize the backend performance hit).
<h3>Settings</h3>
Plugin settings are located under “Media” tab (“Resize before upload”), there you can configure:
<ul>
<li>Max image size in pixels (The images bigger than this threshold are scaled down to it);</li>
<li>Use WP-compat (old) assets uploading script.</li>
<li>A setting to enable / disable on front end / admin part separately.</li>
</ul>
<h3>Bug reports / Questions / Suggestions</h3>
<a href="mailto:wp@tmm.ventures" rel="nofollow ugc">wp@tmm.ventures</a>

Resize Image Before Upload

A WordPress plugin for client-side uploaded images resize (to do it client-side instead of backend-side and minimize the backend performance hit).

Resize Images In Posts vs Resize Image Before Upload