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Force Regenerate Thumbnails
Version: 2.2.2
Description
Force Regenerate Thumbnails allows you to delete all old images sizes and REALLY regenerate the thumbnails for your uploads.
Regenerate all thumbnails from the Tools admin menu. Regenerate batches of images via the Media Library list mode. Select the images to regenerate and then use the Bulk Actions drop-down menu to Force Regenerate Thumbnails. Use attachment actions to regenerate thumbnails for a single image.
Several filters exist for advanced usage. See more via this gist.
You may report security issues through our Patchstack Vulnerability Disclosure Program. The Patchstack team helps validate, triage and handle any security vulnerabilities. Report a security vulnerability.
Installation
- Go to your admin area and select Plugins -> Add new from the menu.
- Search for “Force Regenerate Thumbnails”.
- Click install.
- Click activate.
- Go to Tools -> Force Regenerate Thumbnails OR select specific images from the Media Library list mode to regenerate.
Screenshots
The plugin at work regenerating thumbnails
You can resize specific multiples images using the checkboxes and the "Bulk Actions" dropdown
Reviews
has saved my life
By 
The plugin regenerates the image sizes that are registered. It deletes the unregistered ones AND it also seems to repair the meta data. Impressive! Thank you very much!
It works!
By 
After trying other plugins unsuccessfully, this one worked!
IT WORKS
By 
Unlike other plugins that claim doing the same, this one works and still every image keeps being displayed correctly on the site.
Thanks for this great tool!
BEST AND EASIEST TO DELETE OLD UNUSED THUMBNAILS AUTOMATICALLY
By 
BEST AND EASIEST PLUGIN TO DELETE OLD UNUSED THUMBNAILS AUTOMATICALLY
Thank you for this plugin, so lucky to find it after trying many !
You always know that plugin is working, it displays live results for each image as:
Deleted: 180x180, 600x533
Regenerate: 100x100, 150x150, 270x250, 300x200, 300x300, 570x350, 600x400, 768x512, 800x350, 800x500
Successfully regenerated in 1.625 seconds
Leider unbrauchbar
By 
Von aktuell ca. 38.000 Bildern werden immer nur um die 50 bearbeitet und davon kommt abwechselnd bei 10 bis 20 ein Fehler. Da die Fehler immer bei anderen Bildern kommen, ist das auch ein Fehler vom Plugin.
Nach den 50 bis 60 Bildern geht es dann gar nicht mehr weiter.
Fazit: Leider komplett unbrauchbar das Plugin.
Very good plugin!
By 
Doing job very good. Thank you.
Works like a charm
By 
After a site migration I could not see hundrends of images. I regenerate all the images et voilá! Thank you.
Just does the job
By 
When using third-party themes, it's a usual practice to remove unnecessary image sizes and regenerate existing thumbnails (I've recently used a theme with 15+ new image sizes registered, yikes). I like that I can easily remove image sizes with Perfect Images plugin, however it doesn't allow me to actually delete old image sizes, but this plugin does exactly that with one button - nothing else is needed, honestly.
Very basic, no support
By 
It might work for small websites. But that's it. It won't let you disable unwanted thumbnails. Some thumbnails are registered only for specific actions, but this plugin will create them too. At the end, if you have woocommerce, all your produc tphotos will have blog sizes too. There's no resume action, so with already over 10k you'll be getting access expired. Retry link won't work. At the end, after wasting a week with this plugin, I'm going for other paid versions.
Amazing plugin but a request !
By 
This plugin is amazing and helped me delete thousands of images but I have too many (100k+, Yes I'm very productive) and it always end u failing after processing 80k-90k images. Is there a way for the plugin to start with the very first images uploaded and finish with the most recent ones ? That would be amazing !
Thank you for the plugin and looking forward to your answer,
Best
Changelog
2.2.2
Release Date – June 3, 2025
- fixed: PHP notice when regenerating select images
2.2.1
Release Date – November 12, 2024
- added: list of active image sizes when regenerating thumbs for all images
2.2.0
Release Date – September 17, 2024
- added: regen process can be resumed
- fixed: nonce expiration stops regen process
- fixed: JS errors on thumb regen page
2.1.4
Release Date – April 23, 2024
- fixed: thumb removal via metadata not working due to undefined variable
2.1.3
Release Date – September 13, 2023
- changed: use updated coding standards
- fixed: WP image edits lost if pre-scaled original is used for thumbnail generation
2.1.2
Release Date – March 21, 2023
- changed: improved i18n for page headings and menu entries, props @alexclassroom
2.1.1
Release Date – January 18, 2023
- fixed: invalid trailing comma syntax in PHP 7.2
2.1.0
Release Date – November 10, 2022
- added: PHP 8.0 compatibility
- added: support generating thumbnails from original (pre-scaled), on by default
- added: support for PDF thumbnail generation
- added: ability to skip an image by regenerate_thumbs_skip_image filter
- changed: escape all output, sanitize all input
- changed: ensure all strings are i18n
- changed: remove HTML from i18n strings
- changed: improve path lookup function
- fixed: call to set_time_limit() when it is not allowed
Earlier versions
Please refer to the separate changelog.txt file.