Winsite Image Optimizer

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Image compression for WordPress done right.

Author:Winsite (profile at
WordPress version required:4.5
WordPress version tested:4.8.25
Plugin version:1.0.7
Added to WordPress repository:08-06-2016
Last updated:29-06-2017
Warning! This plugin has not been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.
Rating, %:62
Rated by:9
Plugin URI:
Total downloads:9 170
Active installs:300+
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Winsite Image Optimizer will compress your images for optimal file-size while keeping its quality (pretty much) intact, using the ImageOptim API (and other processing engines coming up soon).

You can also process all of your old images retroactively using our dedicated tool, found under the Media section.

Currently-implemented Image Processing Services:

Warning: This won’t work on localhost in some cases, since some services work in a way that they pull images in from your site. This is why you’ll need a public URL in order to make this work locally.
You can use a service such as ngrok to achieve that, in conjunction with this filter:

add_filter( 'wsi_siteurl_override', function( $siteurl ) {
    return '';
} );

We’d love to recieve contributions / suggestions from you on our GitHub project.