Blogestudio

Pau Iglesias

For each image uploaded WordPress generates several versions with different sizes. These images will be inserted 
in the post content using the visual editor selecting the right format size for the current theme, so that 
images can be displayed correctly in the theme layout avoiding the overflow to the sidebars or another elements.
These images are now part of the content, and are harcoded in posts independently to any change in the design 
or behavior of the blog.
Therefore, when switching your theme to another theme smaller, or the new theme is very big respect the old 
layout, may be these images do not fit perfectly with the new design.
For these cases the purpose of this plugin is the searching in the post content of images with the old image sizes 
(that result bad sizes for the current theme) and replace it for the right image format: thumbnail, medium, large, 
full or custom format size.
The process is simple and consists of three steps. The first step is a form to introduce the width to find, or the 
period between two widths separated by an hyphen (-) with max 100 points of difference. Optionally you can enter 
a custom post type, or leave blank for the ‘post’ post type.
In the next step present the coincidence or multiple coincidences for each post, with the old html code in grey color, 
and in black the replacement, and also the new image is displayed. For each item there is a checkbox (by default checked) 
that you can uncheck if the result is wrong or an exception.
Finally, at the end of the list, a submit button can perform these changes. Before this final step, is advisable to 
backup your posts table.

Replace Content Image Size

What a simple and effective plugin to get the job done.

I was able to replace old Image Sizes to the New Image sizes with one click.

And before changing the sizes, it gave me preview for all OLD image html tags and the new tags will be...

Thank you so much for the great plugin!

Great work Pau Iglesias!


Gets the Job Done, Perfectly!

Find images displayed in posts content and change the format size, very useful when you change the blog theme.

aiwatech

Every time you upload an image, WordPress doesn’t just store your file — it generates a separate cropped copy for every registered image size. A fresh install already creates three (thumbnail, medium, and large) on top of the original, so a single upload becomes four files on your server.
Themes and plugins add many more. A typical site might register hero, slider, product thumbnail, team member, and testimonial sizes — and WooCommerce adds several of its own. With six registered sizes, one upload turns into seven files, even when the page only ever displays one of them. The rest sit on disk doing nothing but consuming space.
Multiply that across hundreds of posts, pages, and products and the waste adds up fast: bloated storage, slower backups, and longer upload processing. It’s especially painful on WooCommerce sites, where uploading a single banner or hero image also generates the full set of product thumbnail sizes you’ll never use for that image.
WP Image Sizes fixes this by letting you decide which sizes WordPress is allowed to create.
<ul>
<li>Per post type control — Assign the exact image sizes that matter to each post type from a simple settings page. A slider post type might only need one large size; testimonials might only need a thumbnail.</li>
<li>Choose sizes at upload time — When you add media, the uploader shows the available sizes so you can pick what gets generated for that specific upload.</li>
<li>Disable thumbnails entirely — Skip generating any additional sizes for a post type or a single upload when you only need the original.</li>
<li>No lock-in — WP Image Sizes never caches or alters your files. Any images already generated stay intact, even if you deactivate or remove the plugin.</li>
</ul>
The result is a leaner media library, less wasted disk space, and a faster, lighter WordPress site.
<h3>PRO</h3>
The free plugin controls which sizes get generated on new uploads. WP Image Sizes Pro extends this to your existing media and adds automation:
<ul>
<li>Bulk Create Image Sizes — Generate selected image sizes for all existing images of a chosen post type. Perfect after registering a new size or switching themes.</li>
<li>Bulk Delete Image Sizes — Remove unwanted image size files from existing media to reclaim server space in one click.</li>
<li>Create Images on Runtime — Automatically generate a missing image size the moment it is first requested on the front end, instead of pre-creating every size.</li>
</ul>
<a href="https://aiwatech.com/product/wp-image-sizes-pro/" rel="nofollow ugc">Get WP Image Sizes Pro</a>

WP Image Sizes

Take control of the image sizes WordPress generates. Pick only the sizes you actually use, per post type, and reclaim wasted server space.

Replace Content Image Size vs WP Image Sizes