reGenerate Thumbnails Advanced


A plugin that makes regenerating thumbnails even easier than before and more flexible.
If you install a new theme, it might have different image sizes it wants to use. those image sizes are cropped and resized into thumbnails only when you upload new images. So what happens with your old images?
the ones you already uploaded? They need to be regenerated, this is what this plugin does. It takes each image and generates the thumbnails for each and every one of them.You have the ability to regenerate thumbnails for a aspecific image
by cicking a added button on the media page. You will not be redirected to another page, everything happens on that page with REST api and ajax.


  • Removes ( cleans up ) the thumbnails of the existing images that are no longer of any use (since version 1.5.2 )
  • You can select a period in time for the images to be regenerated from
  • The period is last day, last week, last month or all
  • Clean simple interface where you have a progress bar showing you the percentage of images regenerated
  • You get to see the total number of images affected by your period, as well as the images affected so far when processing
  • You can regenerate individual image withouth navigating away from the page, everything happening on the media page with 1 click of the image you want to modify
  • plugin is available for translation in any language with the rta text domain.


  • The plugin page where it all happens
  • View of the dropdown options


This section describes how to install the plugin and get it working.


  1. Upload regenerate-thumbnails-advanced directory to the /wp-content/plugins/ directory
  2. Activate the plugin through the ‘Plugins’ menu in WordPress


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 and the script is loading?

The script stops, it does not run in the background


Problem in backend

Backend problems:
– the last update changes all the fonts (type and size),
– “Screen Options” tab does not work.

Please solve the problem.

No longer seems to work between dates

This plugin no longer seems to work when selected dates are checked.
The program freezes.
Support questions over several months have mentioned this but no response from author.

Read all 13 reviews

Contributors & Developers

“reGenerate Thumbnails Advanced” is open source software. The following people have contributed to this plugin.




  • The first upload of the plugin


*Shows errors
*GD library error missing library present
*added jquery ui images for
*added jquery ui min css file
*removed the incrementation of processed images if there are none (it was showing one was being processed when it wasn’t)


*images did not get added in the previous version. Neither did the css file for jquery ui


*log section showing what’s been processed (image name)

*Images processed gets updated on regenerate request (it was frozen before if no images where available to be processed)
*Added a extra image

*Added a “no js or js error” message to the page if it’s the case

*Progress and errors aligned with containers
*javascript changed so that it shows processing for errors when processing starts

*Added time (in seconds) to each processed image – You can see how long each image took
*Error log status changes at the end from Processing to “No errors” if there are no errors.

*Added Settings link in plugins info page
*Renamed submenu page to Regenerate Thumbnails under Settings

*Added the possibility to choose a start and end date from where to regenerate the thumbnails from
* Added new style
* Added datepickers

  • Fixed a wp_debug notice bug
  • Fixed a js issue


This version changes the style and adds a bit of functionality to the general settings (a date start-end option to choose from)


nothing that affect the previous data is changed. Update is save


nothing that affect the previous data is changed. Update is save


nothing that affect the previous data is changed. Update is save


Database field is saved someplace else now. It needs to be configured again. Basically just go into settings, click to activate and click save.

Important bugfixes

Important bugfixes


Reverted back to manual regeneration version. No more on the fly stuff

Removed donate button


Requests are being done trough REST API’s now


Added regenerate Thumbnails button to regenerate individual thumbnail


Added tutorial on generate page.


Updated some tags, no functionality changed

Added freemius funtionality

Removed stats, added donate button


Removed donate button


Added a notification message with a link when a theme is switched


Fixed a fatal error bug conflicting with Contact Form Maker

Added donate button


Removes (cleans up ) thumbnails that are not in use of existing images before it regenerates them.

Fixed a space bug.

Fixed a javascript bug, made it work again, as it wasn’t before. Removed the “plugin for sale ad, removed the donate button”

Fixed a php version incompatibility bug


  • brand new interface built entirely on React with redux
  • You can view miniature versions of the images in the regenerated visible results
  • Removed donate button

Important CORS dev mode removal fix

Console error fix


  • Past day fix
  • Added past 3 months
  • Added past 6 months
  • Added past 1 year

*Removed media page buttons

Simple version change. no functionality changed

Style bug fixed

Style bug fixed again

Javascript error fix


Cors security added for routes
Added ShortPixel informative data

Added more details to the info column

Improved accuracy percentage for compressed images

Added shortpixel logo and promotion


PHP bugfix, removed shortpixel image and link, added paypal button