reGenerate Thumbnails Advanced


A free, fast and easy to use regenerate thumbnails plugin supported by ShortPixel ๐Ÿ™‚

Regenerate Thumbnails Advanced (RTA) plugin comes in handy when you install a new WordPress theme on your site that has different image sizes. While the newly uploaded images will be cropped and resized to fit your new theme, the old thumbnails will remain unchanged. Using RTA you can regenerate the thumbnails for all your existing images.
It is also very useful when you have many not-used-anymore thumbnails and you want to remove them while making sure you have all the needed thumbnails generated.


  • Choose the quality of the regenerated thumbs.
  • Option to remove not-used-anymore thumbnails.
  • Remove metadata for missing images and thumbnails
  • Fully integrated with ShortPixel Image Optimizer.
  • Option to select the thumbnail size for featured and non-featured images.
  • Option to easily add as many extra thumbnail sizes as you wish.
  • Interval selection (last day, week, month, all) for the thumbs that will be regenerated.
  • Clean and simple interface where you have a progress bar showing you the percentage of images regenerated.
  • Resume function – the regeneration process will continue from where it was left in case you accidentally close the processing tab in your browser.

For support please contact us here making sure you mention RTA plugin.

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Tangkapan Layar

  • Plugin settings page


Nothing special about the installation process, just visit “Plugins” section in your /wp-admin, search for “regenerate thumbnails advanced”, install & activate the plugin and then from Settings section you can start using it.

Tanya Jawab

Can I regenerate just a few images

You have the option to select from: all, past day, past week, past month

What happens if I close the page while the regeneration process is running?

The script stops but it will resume after you open the settings page of the plugin once again.


12 November 2023 1 balasan
Awesome plugin. All I needed was to fix my broken thumbnails from a veeery old website that I've since transferred to a new server/domain. For some reason, the medium sized thumbnails were completely missing, and although all the full-sized images were there, the site's media looked broken due to having non-existent thumbnails I added a custom thumbnail size in the plugin based off what I was seeing in the Chrome inspector for the missing images, 780x572, and ran the regenerator. All of the images are now fixed. I believe the size is "approximate" based off how WordPress crops, so not all of the broken nor regenerated images were actually that specific size; the general dimension I put in seemed to fix almost all of the thumbnails. I input another dimension to fix the rest. Saved me tons of time trying to find a workaround for this, thanks!
13 Oktober 2023 1 balasan
I don't know if this isn't compatible with MH Themes any more - I've used it successfully before - but now it does nothing.
15 September 2023 1 balasan
Great plugin, still checking the site for now. But 250k previews were cleaned, which was caused by a poorly set template that generated 40 previews from each file. Many thanks for saving lot of hours work.
8 Mei 2023 1 balasan
I could find the option "Delete Unselected Thumbnails" only with this plugin. And finally the old shop website is cleaned and brightened up from all those unused thumbnails ๐Ÿ˜€ Thanks guys! <3
14 April 2023 1 balasan
Regenerate Thumbnails Advanced is an excellent WordPress plugin that offers advanced features for users who need to regenerate their thumbnails quickly and easily. One of the most outstanding aspects of this plugin is its stability. It is very reliable and can resume the regeneration process if it gets stuck, ensuring that you don't lose your progress. Well done! Another great feature of this plugin is that it starts with the newest images instead of the oldest, making the regeneration process faster and more efficient. This is especially useful for users with large media libraries, as they can save a significant amount of time by regenerating only the thumbnails that they need. Keep up the good work!
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Kontributor & Pengembang

“reGenerate Thumbnails Advanced” adalah perangkat lunak open source. Berikut ini mereka yang sudah berkontribusi pada plugin ini.


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Log Perubahan


Release date: February 27, 2023
* Fix: Videos uploaded with VideoPress were removed from the Media Library when using the “Remove non-existing images” option;


Release date: December 1st 2020
* New: Pause Button;
* New: Resuming process from another page now starts paused;
* New: Added Filter for increasing number of items processed per run;
* Fix: Users optimizing more than 50K images could run into a code loop protection.


Release date: August 17th 2020
* Fix : Regenerate Period now calculates from time set in WordPress to respect timezone settting.


Release date: July 13th 2020
* Fix: PHP warning that was displayed on PHP 7.4.x.


Release date: 29th May 2020
* New system for queuing which should be more efficient;
* New – Added regenerate thumbnails button in edit-attachment screen;
* Fixed – Crash when regenerating image from edit media;
* Fixed – Queries for large amount of images should not timeout;
* Fixes for the responsiveness of the regeneration screen;
* Class loader moved to PSR-4.


Release date: 9th March 2020
* Reworked and improved the process interface
* Option in media library to regenerate just one image
* Will check for post_mime_type in posts and fix it when it’s empty.
* Cookie-based processing removed, now keeps progress as a server setting
* Internal processes optimized.
* Fixed – WordPress 5.3 image handling and scaled images
* Fixed – Metadata not being removed in some cases when “Delete Leftover Image Metadata” is checked.
* Fixed – Logger doesn’t call wp_upload_dir when not debugging


Release date: 7th June 2019
* Replace the two options Exact size for featured/non-featured images with one checkbox Only featured
* Button to stop the regeneration
* Make Keep existing be checked by default
* Change “Regenerate selected thumbnails” checklist to a settings selection
* ShortPixel Image Optimizer integration – call the ‘shortpixel-thumbnails-regenerated’ action passing only the changed sizes
* Fix: Security – Image sizes XSS exploit
* Fix: count(): Parameter must be an array


Release date: 17th April 2019
* Fix warnings related to corrupted metadata in some cases


Release date: 16th April 2019
* Plugin completely rewritten with additional features added:
* Add custom thumbnails
* Select which thumbnails to regenerate
* Regenerate thumbnails only for the featured images
* Rewrite the existing thumbnails or not depending on the selected options
* Integrate seamlessly with ShortPixel Image Optimizer
* Delete unused thumbnails from disk
* Remove metadata for missing images and thumbnails


  • please refer to the changelog.txt file inside the plugin archive for the versions before the 2.0.0 full rewrite.