Jose da Silva

This plugin is the a no brain solution to implement lazy loading on your website. After activated the plugin will only load the images when they are needed to be shown to user.
This plugin replaces all your images by a placeholder and it loads the content when gets closer to the browser viewport, when visitor scrolls down.
<h4>Will work on your theme images</h4>
Unlike most of the lazy loading plugins, SW Lazy Load makes a complete page parse for images to apply the rules. This ensures that the images you use on your themes will also be covered with the lazy loading.
The plugin uses the ‘unveil.js’ as support for the functionality. Credits for this lib on ( https://github.com/luis-almeida/unveil )
Please let me know if you need further help with the plugin.

SW Lazy Load

SW Lazy Load is a no brain plugin that allow's you to load only images when they are needed.

Automattic

10up

Mohammad Jangda

Jake Goldman

Lazy load images to improve page load times. Uses jQuery.sonar to only load an image when it’s visible in the viewport.
This plugin is an amalgamation of code written by the WordPress.com VIP team at Automattic, the TechCrunch 2011 Redesign team, and Jake Goldman (10up LLC).
Uses <a href="http://www.artzstudio.com/files/jquery-boston-2010/jquery.sonar/" rel="nofollow ugc">jQuery.sonar</a> by Dave Artz (AOL).

Lazy Load

I hate plugins that don't have any sort of settings or anything. I can't tell if it's actually doing anything. How can I check?

Can't tell if it's working

Lazy load images to improve page load times and server bandwidth. Images are loaded only when visible to the user.

SW Lazy Load vs Lazy Load