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

Smart LazyLoad is a fast, lightweight, and SEO-friendly lazy loading plugin for WordPress. It improves page speed and Core Web Vitals by loading images, iframes, videos, and background images only when they are about to enter the viewport.
Built with pure JavaScript, Smart Lazy Load does not rely on jQuery or other third-party libraries, keeping your site fast and bloat-free.
Unlike heavy optimization plugins, Smart LazyLoad focuses on one thing only: reducing unnecessary resource loading while maintaining compatibility, accessibility, and SEO best practices.
All features are optional — you can use the plugin with default settings or fine-tune it as needed.
<h3>Features</h3>
<ul>
<li>Lazy load images in posts, pages, widgets, thumbnails, avatars, and comments</li>
<li>Lazy load iframes and embedded videos</li>
<li>Lazy load background images from inline styles and data attributes</li>
<li>Optional YouTube iframe replacement with video thumbnails</li>
<li>Intelligent first-image skipping for better LCP scores</li>
<li>Supports both JavaScript-based and native browser lazy loading</li>
<li>Inline plugin CSS and JavaScript (optional)</li>
<li>Option to disable lazy loading for logged-in users</li>
<li>Fully responsive and mobile-friendly</li>
<li>SEO-friendly with noscript fallbacks</li>
<li>Accessibility-aware</li>
<li>Pure JavaScript (no jQuery dependency)</li>
<li>Lightweight and performance-focused</li>
<li>Open source and available on <a href="https://github.com/jumedeenkhan/lazy-load-for-images" rel="nofollow ugc">GitHub</a></li>
</ul>
<h3>Configuration</h3>
You can configure the plugin from:
Settings → LazyLoad
Available options include:
<ul>
<li>Enable or disable lazy loading</li>
<li>Lazy load images, iframes, and videos</li>
<li>Enable background image lazy loading</li>
<li>Replace YouTube videos with thumbnails</li>
<li>Adjust lazy load threshold</li>
<li>Enable native browser lazy loading</li>
<li>Inline plugin CSS and JavaScript</li>
<li>Disable lazy loading for logged-in users</li>
</ul>
Need more help?
For detailed documentation, usage examples, available filters, and advanced configuration options for Smart LazyLoad are available.
See the <a href="https://www.mozedia.com/lazy-load-wordpress/" rel="nofollow ugc">Lazy Load Configuration Guide</a>
Support
We are here to help. Feel free to open a new thread on the <a href="https://wordpress.org/support/plugin/lazy-load-for-images/" rel="ugc">Support Forum</a>.

Smart LazyLoad – Lazy Load Images, Videos and Iframes

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 ⚡

The best free, lightweight lazy load plugin for WordPress. Lazy loading images, videos, and iframes to improve performance and Core Web Vitals scores.

Thumbnail Upscale vs Smart LazyLoad – Lazy Load Images, Videos and Iframes