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Real Thumbnail Generator: Efficient regeneration of thumbnails in all sizes

Real Thumbnail Generator: Efficient regeneration of thumbnails in all sizes


(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.

Free Sandbox

You want to try WordPress Real Thumbnail Generator before
installing? Take a free sandbox and play around!

Create sandbox


Some of the features listed below are only available in the PRO version of Real Thumbnail Generator. They are marked with an asterisk.

  • Mass regeneration of thumbnails in the media library
  • Regenerating individual images in the media library
  • Works great with PDF files (note requirements)
  • Skip already existing thumbnails *
  • Detection and deletion of unused image sizes *

  • Reliable and fast regeneration of thumbnails (without aborts as known from other plugins)

  • Compatible with all major themes and many plugins
  • Custom upload structure for thumbnail paths and file names *
  • Supports WordPress Multisite

  • One-time payment with lifetime updates

  • Fast support from Germany
  • DSGVO/GPDR: The plugin does not collect any personal data without your consent!


Real Thumbnail Generator is compatible with all common themes and plugins.


  • Regenerate single images
  • Regenerate multiple images
  • Analyse the condition
  • Details and deletion of unused images
  • Select image sizes to be generated
  • SEO-optimised folder structure


  1. Go to your WordPress backend
  2. Navigate to “Plugins” > “Add New”
  3. Search for “WordPress Real Thumbnail Generator”
  4. Install and activate the plugin
  5. Go to “Media” in the left sidebar and enjoy the advanced media management with folders


What does “Custom upload structure” mean?

The custom upload structure can be easily set in the media settings of the Pro version. Here is a little example how the WP standard upload looks like:
… and after you set a custom upload structure it can look like:


abril 12, 2024 1 reply
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.
febrero 17, 2023
Hallo, Thumbnails fuktioniert sehr gut. Konnte alle Fotos wieder herstellen.
chulio 18, 2022 1 reply
Before you can use the plugin, you are FORCED to agree to send technical data to the developer, which is against WordPress terms! They do this by forcing you to agree to check a box saying that you have read the Privacy Policy, which I don’t mind, AND agree to sending technical data to the developer, because both are included on the same check box, and if you don’t check the box, the plugin won’t work! The stupid thing is that the plugin itself works okay, so if it weren’t for this coercion, and then nagging me to leave a rating for the plugin, I would have been more than happy to check out the Pro version, instead they have lost a potential customer AND got a 1-star review from me.
chulio 9, 2022
The plugin author(s) must have put a lot of effort into the user interface; it’s beautiful! They have made a product that works nicely and is a pleasure to use.
aviento 23, 2021
Needed to regenerate thumbnails for PDF’s and the free version worked perfectly. Thank you very much to the devs.
Read all 13 reviews

Contributors & Developers

“Real Thumbnail Generator: Efficient regeneration of thumbnails in all sizes” is open source software. The following people have contributed to this plugin.



You can view the changelog and release notes here.