Just Image Optimizer uses Google Page Speed Insights API to compress image files, improve performance and boost your SEO rank.
As of April 2026, Just Image Optimizer is a WordPress image plugin with 20 active installations and a 4.3/5 rating from 6 reviews. It has been downloaded 3.3K+ times in total. Requires WordPress 4.5+ and PHP false+. Available on WordPress.org since 2018. Last updated 7 years ago — may have compatibility concerns. Top alternative: Firelight Lightbox.
It’s the only plugin that will help you pass Google Page Speed image size optimization test. Furthermore, it compresses image file size, so you get a performance boost and improve your page rank in Google.
The plugin uses Google Page Speed Insights API to optimize images. All you need is a Google console account and an API key.
Image Optimization runs in the background on Google servers, so the site will keep its performance intact. There are no special server requirements.
If you have any feedback or ideas, please raise an issue in our GitHub repository:
https://github.com/justcoded/just-image-optimizer/issues
Plugin is compatible with such plugins:
| WordPress | 4.5+ requiredTested up to 5.0.25 |
| PHP | false+ required |
Plugin data sourced from WordPress.org. Analysis and metrics by PluginSift.