Imsanity
View on WordPress.orgScores higher than 96% of indexed plugins
About
Automatically resizes huge image uploads. Are contributors uploading huge photos? Tired of manually resizing your images? Imsanity to the rescue!
What It Does
Imsanity automatically resizes oversized image uploads to a configurable maximum dimension (width, height, and file size) as soon as they hit the WordPress media library. It can also bulk-resize existing images already stored on your site, which is useful for cleaning up after a long history of contributor uploads. The plugin focuses strictly on resizing and capping dimensions, not on compression to WebP/AVIF or other advanced format conversions.
Who It's For
This plugin is a strong fit for sites that accept image uploads from contributors, members, or the general public and routinely get 4000+ pixel phone photos dumped into the media folder. Small businesses, community forums, travel blogs with user submissions, and nonprofits on tight hosting plans will get the most value, since it directly reduces disk usage and page weight without any per-image labour.
Who Should Skip It
If you already run a full optimization suite like ShortPixel or EWWW Image Optimizer, those plugins cover the resize-on-upload use case along with WebP/AVIF conversion and lossy compression, making Imsanity redundant. Photographers who want full-resolution originals preserved for portfolio display or print sales should also skip it, since it actively caps dimensions by design.
The Bottom Line
Imsanity is a focused, well-maintained utility that does one thing well: stop bloated image uploads from filling up your hosting account. With an overall quality score of 85.94/100 and 200,000 active installs, it is a sensible default pick for sites that accept uncurated uploads and do not already run a full optimization suite. It is not a replacement for a full image optimizer, but for the specific job of capping dimensions it remains a top option.
Related Plugins
Pick EWWW instead if you want resizing plus deep compression, WebP/AVIF conversion, and CDN delivery in a single plugin, with broader support resources.
Pick Firelight Lightbox instead if your main problem is displaying images attractively in galleries rather than managing upload sizes.
Pick ShortPixel when you need aggressive lossy/lossless compression and WebP delivery alongside resize-on-upload, and you do not mind a quota-based pricing model.
Pick Responsive Lightbox instead if you need image presentation and gallery features, not backend upload management.
Pick Resize Image After Upload as the closest direct alternative if you want similar single-purpose resize-on-upload behaviour with a simpler settings page.