Wouter Postma

This plugin adds a simple Javascript to your WordPress website that will check for each image if there is a retina version available. This will make sure that your images (logo’s, buttons, images with text) look sharp on Apple devices with retina displays.
When you have for example a logo of 200 by 200 pixels called “Logo.png”, you will need to upload a second image of 400 by 400 pixels called “Logo@2x.png” in the exact same directory.
<ul>
<li><a href="http://imulus.github.io/retinajs/" rel="nofollow ugc">Retina.js by imulus</a></li>
<li><a href="https://profiles.wordpress.org/wouterpostmanl#content-plugins" rel="nofollow ugc">View my other plugins</a></li>
</ul>

Retina @2x

Gets the @2x image and shows it on retina devices. Works fine!



Works fine

This plugin does exactly what it should do and it's lightweight and simple. 

Simple and Easy

A plugin that looks for retina images automatically based on the @2x naming convention.

Jonathan Desrosiers

Slocum Studio

Seamlessly switches out images on Retina and other high pixel density screens with @2x versions.
The switch happens server side saving on HTTP requests.
No action is required on your part other than to activate it and to regenerate your thumbnails with the <a href="https://wordpress.org/extend/plugins/regenerate-thumbnails/" rel="ugc">Regenerate Thumbnails</a> plugin.
Plugin automatically:
<ul>
<li>Detects a HighDPI screen such as a Retina display</li>
<li>Detects all image sizes added using add_image_size() and adds @2x versions.</li>
<li>Replaces featured thumbnails and content images with the @2x versions for users with HighDPI screens.</li>
</ul>

Simple WP Retina

Seamlessly replaces images with @2x versions on Retina and other high pixel density screens. Change is performed server side saving requests.

Retina @2x vs Simple WP Retina