Hey guys,

we are two devs who built a free & open source image optimization plugin (GPLv2): neoOptimize

• WP Plugin Directory: https://wordpress.org/plugins/neo-optimize/
• Code on GitHub: https://github.com/neo-wp/neowp-plugins

Most image resizing plugins downsize your original image files to some fixed size and you lose the original data forever. We wanted to keep the originals (similar to non-destructive editing).

So we built a small free/open-source plugin that tries to solve this by leaving your images as-is and copying a resized version into the cache folder. The image size is determined by the exact size the image is used on your site.