NinjaWeb

NinjaWeb Smart Media Optimizer is a local media optimization engine for WordPress site owners, maintainers, and agencies who want controlled image processing without relying on an external optimization service.
The plugin runs inside WordPress using the image tools available on your server. There are no API keys, no credits, no monthly image caps, no required CDN, and no subscription gate for the core workflow. You control when images are scanned, queued, optimized, retried, and restored.
The workflow is designed for transparency. Instead of hiding the process behind a remote service, the plugin provides a real-time Media Engine panel with progress, current job details, live activity logging, pause/resume/stop controls, failed-item retry, and clear restore options when backups are available.
Key features:
<ul>
<li>Local optimization using your WordPress/server image tools</li>
<li>No external API, no credits, no CDN dependency, and no required subscription</li>
<li>Real-time bulk optimizer with progress, pause, resume, stop, retry, and live activity log</li>
<li>Optimize used images, all pending images, the full Media Library, or selected images</li>
<li>Usage-aware scanner for featured images, galleries, common content embeds, and upload URLs</li>
<li>Local WebP generation for JPEG and PNG images when supported by the server</li>
<li>Search and filter Media Library images from one screen</li>
<li>Oversized-image detection based on your configured maximum width</li>
<li>Compression presets with simple guidance</li>
<li>Custom quality mode for advanced control</li>
<li>Maximum-width resizing for large uploads</li>
<li>Optional minimum file-size threshold so tiny images can be skipped</li>
<li>Optional PNG to JPG conversion modes for non-transparent PNG files, disabled by default</li>
<li>Transparent PNG protection</li>
<li>Backup originals before changes</li>
<li>Restore selected images or restore all originals when backups exist</li>
<li>Original Kept status when optimization would not reduce the file size</li>
<li>Regenerate WordPress attachment metadata after changes</li>
<li>Preserves attachment IDs instead of replacing posts or breaking relationships</li>
<li>Global dashboard stats for total images, optimized images, pending images, backups, and optimized media size saved</li>
</ul>
NinjaWeb Smart Media Optimizer is intentionally built for a deliberate, auditable workflow rather than remote black-box processing.
Official documentation, updates, and support: 
<a href="https://ninjaweb.com.au/products/smart-media-optimizer/" rel="nofollow ugc">Smart Media Optimizer by NinjaWeb</a>

NinjaWeb Smart Media Optimizer

Free local image optimizer. No API, credits, or CDN. Bulk optimize, WebP, backups, restore, and used-image queues.

WP Gear Pro

Manny Rodrigues

WP Imsizer (short for Image Resizer) is a plugin for <a href="https://wordpress.org/" rel="ugc">WordPress</a> which will save you and your clients or fellow blog contributors from having to manually resize all of your images to a more visitor friendly size. You can even restrict the total file size of uploaded images and even disable the <a href="https://make.wordpress.org/core/2019/10/11/updates-to-image-processing-in-wordpress-5-3/" rel="nofollow ugc">WordPress image 2560px threshold limit</a> which was introduced in version 5.3.
When someone uploads an image that is larger than your set dimensions, WP Imsizer will automatically scale it down to your desired pre-configured size and replace the original image.
Now can automatically set filtered image upload Alt, Title, Caption, and Descriptions from filename. Filters out hyphes, underscores, commas and extra spaces. Also, automatically capitalizes each word and will disable the default WordPress insertion of Titles from filenames.
The <a href="https://wordpress.org/plugins/wp-imsizer/" rel="ugc">WP Imsizer Plugin</a> is ideal for WordPress web sites and blogs that do not require super high resolution images. This will save space on your server, speed up your page speed performance, and reduce bandwidth utilization for both you and your visitors. As a result of being able to quickly display your media on your web site, this will most likely <a href="https://moz.com/learn/seo/page-speed" rel="nofollow ugc">improve your search engine ranking</a>.
Did <a href="https://endurtech.com/wp-imsizer-wordpress-plugin/" rel="nofollow ugc">this plugin</a> save you time and add value? <a href="https://endurtech.com/give-thanks/" rel="nofollow ugc">Share your appreciation</a> and support future improvements.
<h3>Features</h3>
<ul>
<li>Disable the WordPress 2560px image upload threshold limit.</li>
<li>Resize uploaded images to a pre-defined maximum height or maximum width.</li>
<li>Image S.E.O. Options to filter and set image upload Alts, Titles, Captions and Descriptions.</li>
<li>(Coming soon) Restrict image uploads which exceed your specified max file size.</li>
<li>Convert, non-transparent, PNG images to JPG.</li>
<li>(Coming soon) Ability to selectively bulk resize your existing images.</li>
<li>Does not perform any additional image compression functions on your images.</li>
<li>Only resizes newly uploaded JPG images after plugin activation and setup.</li>
</ul>

WP Imsizer

A handy plugin for any WordPress web master wanting to help their clients with reasonably sized image uploads. This keeps their web site images to a reasonable dimension (one that we can set) for optimal page speed performance. It will also disable WordPress' 2560px image dimension threshold limit. An annoying feature since it keeps the original but renames the main use image with -scaled. No way to remove the original (besides manually) which is usually in the MegaByte file size range. Overall great little plugin. But don't take my word for it, I'm biased. ;)

Regaining Control of our Images

Auto resize/convert image uploads to set height/width or file type. Auto set image alt, title tags, limit file size and disable 2560px limit.

NinjaWeb Smart Media Optimizer vs WP Imsizer