Konrád Koller

This plugin helps you to fix any missing thumbnail issue in a fairly short time. The only thing you need to do is just few simple click and the plugin does the rest. It can be really helpful if you have thousands of images in your database.
You can regenerate thumbnails for each single image in your database or you can simply select those you really want to update. If you choose a post or page the plugin will regenerate thumbnails for each related images. You can choose from the following methods:
<ul>
<li>Regenerate thumbnails for all images in the database.</li>
<li>Bulk action in post liste: You can choose which one to update by checking the checkboxes.</li>
<li>Media library items: Move your mouse over the chosen image(s) and click on “Regenerate thumbnails” link.</li>
<li>Post editor: click on “Regenerate thumbnails” button which is next to “Add media” button. (Off by default)</li>
</ul>
Furthermore you can add your own thumbnails sizes, change default JPG compression rate and mass regenerate thumbnails. The best thing about this plugin is that you can use it with custom post types as well.

ONet Regenerate Thumbnails

Doesnt have 4.4.1 bulk generation support. But you can generate thumbnails one by one.



Doesnt have 4.4.1 support completely

Fix missing thumbnails in no time with few easy clicks. The plugin does the hard work.

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.

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