Jordy Meow

When you insert images in WordPress, it’s always a specific image size. It can be an image size such as Medium, Large or something else set by your theme or another plugin. When you update your media sizes settings (or switch theme), you need to regenerate those images (with Regenerate Thumbnails, for example). But what about your posts content? They will be still using the old images, which aren’t actually part of the new metadata, and little by little your WordPress will become more and more broken. This plugin fixes this by regenerating the HTML for your thumbnails / images in your content and keeps everything clean. Once this is done, it’s a good idea to run a tool like Media Cleaner (https://wordpress.org/plugins/media-cleaner/) on your install to detect the useless files.
Be careful!. Before using this plugin, backup your database! It doesn’t modify your files, only database.

Regenerate Thumbnails HTML

Works well on my two plugins after switching to a new theme. Regenerate Thumbnails (after set up the new sizes) + Regenerate Thumbnails HTML (on all posts, for 2 or 3 sizes) + Media Cleaner (to delete the useless files). In one hour, the new installs are neat and clean.

It works well

Thank you!
After change WP media sizes for new theme we must use regenerate thumbnail plug-in. But I want apply new sizes in old post! After that I can clear old images!

Good work with "view-broken-links" plug-in.

Gold in ocean of wp problems

Update the HTML of the images contained in the post from one image size to another. Useful when switching between sizes and themes.

Jan Karres

devowl.io GmbH

Matthias Günter

Mario Günter

Faruk Garic

(Re)generate single or multiple image sizes for your WordPress website and create a SEO-optimised custom structure for uploading thumbnails.
Regenerate UNLIMITED thumbnails with the free version!
In the course of optimising a WordPress website, it can often be necessary to change the theme – especially if the website is still being created. Unfortunately, a theme change can alter the image sizes and lead to despair. This is where Real Thumbnail Generator comes into play: The WordPress plugin is responsible for regenerating the image sizes. With a few clicks, the problem is solved! This way, themes can be changed as often as desired without negatively affecting the media management.
<h3>Free Sandbox</h3>
You want to try WordPress Real Thumbnail Generator before 
installing? Take a free sandbox and play around!
<a href="https://try.devowl.io/?product=RTG" rel="nofollow ugc">Create sandbox</a>
<h3>Features</h3>
Some of the features listed below are only available in the <a href="https://devowl.io/go/real-thumbnail-generator?source=wordpress-org-description" rel="nofollow ugc">PRO version of Real Thumbnail Generator</a>. They are marked with an asterisk.
<ul>
<li>Mass regeneration of thumbnails in the media library</li>
<li>Regenerating individual images in the media library</li>
<li>Works great with PDF files (<a href="https://devowl.io/knowledge-base/wordpress-pdf-thumbnails-not-generated/" rel="nofollow ugc">note requirements</a>)</li>
<li>Skip already existing thumbnails *</li>
<li>
Detection and deletion of unused image sizes *
</li>
<li>
Reliable and fast regeneration of thumbnails (without aborts as known from other plugins)
</li>
<li>Compatible with all major themes and many plugins</li>
<li>Custom upload structure for thumbnail paths and file names *</li>
<li>
Supports WordPress Multisite
</li>
<li>
One-time payment with lifetime updates
</li>
<li>Fast support from Germany</li>
<li>DSGVO/GPDR: The plugin does not collect any personal data without your consent!</li>
</ul>
<h3>Compatibility</h3>
Real Thumbnail Generator is compatible with all common themes and plugins.

Real Thumbnail Generator: Efficient regeneration of thumbnails in all sizes

Great and up to date


Another freemium plugin that's not even do what it's advertise.Stopped after about 30% of regeneration process, told me to rate the plugin and did not even allowed me to regenerate missing sizes - i need to regenerate all of them.Most of the features are blocked under paywall.That's not the proper way of introducing your product.


Just no

Real Thumbnail Generator is a WordPress plugin for regenerating thumbnails. It is beginner-friendly, SEO-optimised and GDPR-compliant.

Regenerate Thumbnails HTML vs Real Thumbnail Generator: Efficient regeneration of thumbnails in all sizes