Directory / plugin
Post Script Responsive Images
v2.1.0 · by PStevenson
SRCSET responsive images on wordpress for content images.
About this plugin
In short, this plugin modifies “the_content()” and the post thumbnail function by re-rendering the images with use of the SRCSET attribute. Other plugins do this for templated images, but not in the content region itself. This plugin will automatically work with any previously uploaded images as well.