shindev

Every time you upload an image, WordPress and your theme create several extra copies — often eight to ten files per image. On shared hosting with inode (file count) limits, this fills your quota fast, slows down backups, and wastes disk space.
ShinPix gives you back control:
<ul>
<li>Choose which image sizes are generated. See every size registered by WordPress and your theme, with dimensions, and disable the ones you do not use.</li>
<li>See your savings. ShinPix shows how many files each upload stores now versus the maximum, so you can see the inodes you save at a glance.</li>
<li>Safe by default. ShinPix flags the sizes the WordPress admin and block editor rely on, and warns you before you disable them.</li>
<li>Cap oversized uploads. Automatically scale down huge phone photos (often 4000px+) to a sensible maximum, keeping web quality while cutting file size.</li>
<li>Convert to WebP. Create a lighter WebP copy of every new upload and serve it automatically to browsers that support it — with the original kept as a fallback. ShinPix detects whether your server can produce WebP and disables the feature gracefully if it cannot.</li>
<li>Compress on upload. Set the quality used for the images WordPress generates, so every size is leaner.</li>
<li>Optimize your existing library. Scan what is already in your Media Library and convert it to WebP in the background, batch by batch, with a progress bar you can pause and resume. Optimize or re-optimize a single image right from the Media Library, and retry anything that failed.</li>
</ul>
ShinPix is built for the real world of budget shared hosting. It is lightweight, adds no front-end overhead, and only changes what happens at upload time.
Coming soon (and on the roadmap):
<ul>
<li>AVIF conversion (Pro)</li>
<li>Scheduled, fully automatic background processing (Pro)</li>
<li>Offload to S3, Cloudflare R2, Wasabi and other object storage to remove image files from your server entirely</li>
</ul>
ShinPix is part of the ShinKit family of WordPress tools.

ShinPix – Image Optimizer & Size Control

Control which thumbnail sizes WordPress generates, cap oversized uploads, and convert images to WebP — built for shared hosting.

Steve

Easy Image Sizes For WordPress is a very simple plugin that allows you to create an unlimited number of different image sizes and them alongside the builtin ones (ie. thumbnail, small, medium etc)
When an image get uploaded through the WordPress media manager (including the featured image option), WordPress creates variations of said image at different sizes for use in different scenarios. I am sure you will have seen the option to select either thumbnail, medium, or full size when inserting an image into a post or page. This plugin simply adds to the list of automatically generated sizes available.
Features:
<ul>
<li>Create an unlimited number of image sizes</li>
<li>Custom sizes automatically appear in the media manager for inserting into posts</li>
<li>Images sizes are available for the featured image/post thumbnail</li>
<li>Have WordPress crop or scale the image</li>
<li>Set cropping positions (ie. top, bottom, right etc)</li>
<li>Uses all native functionality for a smooth experience</li>
</ul>

Easy Image Sizes

Good thing!

Remarkably easy to use (after some initial confusion on my part from not reading the instructions).

I created an image size to be used with a list of posts.  When I looked at the list of posts, the images were displayed in their expected sizes.  Easy peasy!

Easy to use

Easy Image Sizes allows you to configure different WordPress image sizes and use them alongside the standard ones (ie. thumbnail, small, medium etc)

ShinPix – Image Optimizer & Size Control vs Easy Image Sizes