Stanislav Khromov

This plugin enables upscaling of thumbnails for small media attachments. The default behaviour of WordPress is to not upscale small images, which means 
you are never guaranteed a certain size for a thumbnail format. This plugin corrects that and upscales small images to the specified thumbnail dimensions. 
This is beneficial in grid layouts where images of different sizes can make the grid malfunction.
<a href="https://wordpress.org/plugins/thumbnail-upscale/screenshots/" rel="ugc">Check screenshots for an example!</a>
Important: Your thumbnails format must have the crop setting enabled to be processed by this plugin.
Usage
After you have enabled Thumbnail Upscale plugin, all your future uploaded images will be upscaled. 
For existing images, install and run <a href="https://wordpress.org/plugins/force-regenerate-thumbnails/" rel="ugc">Force Regenerate Thumbnails</a> 
This will upscale your existing media images!
<h3>Requirements</h3>
<ul>
<li>PHP 5.2 or higher strongly recommended</li>
</ul>
<h3>Translations</h3>
None. The plugin has no translateable strings.

Thumbnail Upscale

Whaaaaat? You don't use this plugin? It's good.

It’s still relevant god damn it

Enables upscaling of thumbnails for small media attachments

Jumedeen khan

Mozedia

Lazy Load for Images plugin make lazy load WordPress Images with less then 2kb small pure javascript code, no need jQuerry.
It’s help to increase performance of your website and make it fast loading and improve your website SEO rankins.
This plugin make lazy load of all type images like thumbnail, post content images, avatars, gravatars, widget images .etc.
All images load only when users scroll down and they are on viewport. It’s SEO and user friendly, working well with all browsers.
This plugin is structured very simple and does not need any settings. Activate it, Done!
<blockquote>
<h4>Lazy Load for Images – Features & Advantages</h4>
<ul>
<li>Load images only when required.</li>
<li>Improve page loading speed.</li>
<li>Reduce no. of HTTP requests.</li>
<li>Lazy load also working on mobiles.</li>
<li>Plugin used pure JS, no need of jQuery.</li>
<li>Plugin used less than 2kb Javascript.</li>
<li>Also support Gravatar.</li>
<li>Also support Genesis Framework.</li>
<li>SEO friendly (search engine optimized).</li>
<li>Worked great with genesis framework.</li>
<li>No need configurations (Just activate it, It’s Done!)</li>
<li>Of course, available on <a href="https://github.com/jumedeenkhan/lazy-load-for-images" rel="nofollow ugc">GitHub</a></li>
</ul>
</blockquote>
Simply install the plugin to enjoy a faster website. No options are available : you install it and the plugin takes care of everything.

Lazy Load for Images

A must-have for the fastest page load time, save bandwidth cost. Just install and activate and your site is ready to load with Rocket speed. Awesome work, Highly recommended! 

💯 Excellent plugin, Improves Page Load time Instantly ⚡

Lazy Load WordPress images with a small javascript. Load images only after scrolling down and when viewport and improve page speed and SEO rankings.

Thumbnail Upscale vs Lazy Load for Images