Real Thumbnail Generator — Efficiently Regenerate Thumbnails in Mass


Turn your WordPress media thumbnails to the next level with fast mass regeneration. Single or bulk regenerate images and create a custom thumbnail upload structure with this unique plugin (Pro).

RTG (Real Thumbnail Generator) Lite allows you easily to regenerate all your (existing) thumbnails in your media library. You can regenerate a single or bulk images. The regeneration of thumbnails can up to be 33 % faster than other plugins due to chunked regeneration. Just install this plugin and it works fine with all your image and media files. It also supports multisite.

Features (Lite):

  • WordPress 5.0 ready
  • Single regenerate images in media library table, grid and attachment view mode
  • Bulk regenerate in media library (table and grid mode)
  • Works great with PDF files (WP 4.7+ required)
  • Regenerate your whole media library
  • Works with your existing images
  • Can be up to 33 % faster than other plugins because RTG uses less requests to regenerate
  • GPDR / DSGVO: The plugin is collecting no personal data!
  • Compatible with touch devices
  • Supports multisite

PRO Version available with additional features:

  • Skip already existing thumbnail files
  • Only regenerate a set of image sizes, that means if you have registered a new image size you can only regenerate that one. That means you can skip other image sizes.
  • Custom upload structure for thumbnail pathes and filenames (you can define a pattern with placeholders)
  • Detect unused image sizes (for example after theme switch) and delete them
  • One time payment, forever free updates
  • Fast support

→ Interested in the Pro version?


  • A new "Thumbnails" button is added to the media library
  • You can analyse all your items to recalculate the index
  • Or directly bulk rengerate your images
  • Jump from single file to single view
  • Single view
  • Available settings


  1. Goto your wordpress backend
  2. Navigate to Plugins > Add new
  3. Search for «WP Real Thumbnail Generator»
  4. «Install»


  1. Download the plugin from this site (
  2. Copy the extracted folder into your wp-content/plugins folder
  3. Activate the «WP Real Thumbnail Generator» plugin via the plugins admin page

Часто задаваемые вопросы

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:


This review is for the Premium version! The task was to migrate a Joomla! page to WordPress and the customers were not happy with WordPress´ media file management. They used to create a physical folder per blog post, add the images for this post and create a slider out of all images in this folder. WordPress had to be tricked into that sort of media management with the help of @mguenter´s plugins "Real Media Library" (free) "Physical Custom Upload Folder" (premium) and Real Thumbnail Generator" (premium). What is special about this plugin? There are a few plugins out there that allow generation of a physical upload folder within /wp-content/uploads. The thing is: WordPress automatically generates thumbnails for every image within the folders and adds them to the folder. So, the sliders contain not only the images themselves, but the thumbnails as a "bonus". This plugin allowed me to generate the thumbnails in a sub-folder, so they are not added to the sliders. Yay! Works perfectly well, saved me some coding time and is, as far as I found, the only plugin to do so.
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Участники и разработчики

«Real Thumbnail Generator — Efficiently Regenerate Thumbnails in Mass» — проект с открытым исходным кодом. В развитие плагина внесли свой вклад следующие участники:


Журнал изменений

You can view the changelog and release notes here.