DimitriAus

Manly WebP Converter converting images to the modern WebP format. For example, a shop with 1,000 products can see overall storage drop from around 15 GB to 6 GB. Page load times are reduced proportionally.
Features: 
– Convert images for one WooCommerce product or all media images. 
– Keep originals during testing or delete originals after conversion. 
– Updates attachment metadata and content references in posts, pages, and all other post types. 
– Shows progress, logs, and total bytes saved. 
– Adjustable WebP image quality — test on a single page or product first and verify picture quality visually before converting your entire library. 
– Conversion of thousands of pictures may take hours; you can stop at any time by clicking the Stop button and resume later by clicking Start again — already-converted images are skipped automatically. Refreshing or closing the page is also safe: each image is saved to disk as it is processed, so starting again after a page refresh will continue from where the conversion left off.
<h4>Requirements</h4>
This plugin requires the PHP GD extension, which is usually included with standard PHP installations. If GD is not already active on your server, it can be enabled in cPanel → PHP Configuration with a single tick.
<h4>Conversion Modes</h4>
Both modes convert attachments stored in the media library. The difference is scope:
<ul>
<li>Single Product — reads the featured image and gallery post meta of the chosen WooCommerce product and converts only those linked attachments.</li>
<li>All Images — queries every JPEG, PNG, and GIF attachment in the entire media library, regardless of whether it is attached to a product.</li>
</ul>
After each conversion, the plugin searches <code>post_content</code> and <code>post_excerpt</code> across every post type (posts, pages, products, custom post types) and rewrites both full URLs and path-only references. It does not update image URLs stored in post meta or custom fields (e.g. page-builder block attributes saved outside the content column).
WooCommerce product images are safe because featured images and gallery images are stored as attachment IDs, not URLs — WordPress resolves them dynamically from the updated attachment record.
Warning: page builders and URL-based custom fields. Tools such as Elementor, Divi, Beaver Builder, and ACF (when set to return a URL) store image URLs directly in post meta. These are not rewritten by this plugin. If you then delete the original files, any such stale URL will point to a missing file and cause broken images on the front end.
Recommended workflow: 
1. Run the conversion with Keep Originals enabled. 
2. Check your site visually — especially pages built with a page builder. 
3. Only disable Keep Originals (to delete originals) once you are confident no post meta or theme option holds a raw image URL that has not been updated.
<h3>Additional Information</h3>
This plugin is primarily designed for WooCommerce stores. While the All Images mode covers the entire media library, the core workflow and Single Product mode are built around WooCommerce product images. More detailed guidance will be added in a future update.

Manly WebP Converter

Reduces server space and page load times by converting WordPress and WooCommerce images to WebP format.

giuliopanda

Bulk images allows you to optimize images uploaded to wordpress without creating unnecessary copies of the upload folder!
Warning: the plugin overwrites images. 
Later the plugin tries to update links to images in articles and metadata, but it may happen that these need to be recreated. Other plugins that optimize images generally duplicate all images and create complex overlays to manage their systems. This plugin is designed to keep sites with the original wordpress structure, but it may require a little more work later. But I believe this work is rewarded by better final quality. 
If anything goes wrong anyway you can go back with the restore button.
<ul>
<li>You can resize all images with just one click.</li>
<li>You can convert images to webp.</li>
<li>You can optimize images by choosing quality.</li>
<li>You can change the name of the images</li>
<li>It is optimized to speed up the bulk process. 1000 images take a few minutes on a normal server.</li>
<li>You can enable the option to optimize images when uploaded to the server.</li>
<li>Allows you to decide the maximum size of the images and the quality in which they should be compressed.</li>
<li>Adds to media-library (list version) the possibility to select the images to be optimized.</li>
<li>Through graphics it allows you to monitor the status of the images on the server.</li>
<li>Ability to use specific hooks to customize optimization options.</li>
<li>You can restore and go back to the original images.</li>
<li>
You can remove the original images if you have space problems.
The GitHub repo can be found at <a href="https://github.com/giuliopanda/op-bulk-image-resizer" rel="nofollow ugc">https://github.com/giuliopanda/op-bulk-image-resizer</a>. Please use the Support tab for potential bugs, issues, or enhancement ideas.
</li>
</ul>
<h3>Credits</h3>
The Bulk image resize was started in 2021 by <a href="giuliopanda@gmail.com" rel="nofollow ugc">Giulio Pandolfelli</a>

Bulk images optimizer: Resize, optimize, convert to webp, rename …

One of the few plugins that overwrites images while keeping your website clean

Manly WebP Converter vs Bulk images optimizer: Resize, optimize, convert to webp, rename …