Custom Thumbnail Generator

Description

Custom Thumbnail Generator is a powerful tool for defining and managing custom image sizes in WordPress.

Key Features

* **AJAX-powered Interface:** Add, remove, and regenerate thumbnails instantly without a page reload.  

* **Theme Independence:** Custom image sizes are decoupled from themes, ensuring they remain accessible and functional even when themes are switched.  

* **Consistent Image Handling:** Provides developers, photographers, and content creators with precise control over image dimensions.

License

This plugin is licensed under the GNU General Public License v2 or later (GPLv2+).

You are free to use, modify, and distribute this plugin under the terms of the GPL license.

Screenshots

  • A screenshot of the main settings page, showing all available options.

Installation

  • Upload the plugin folder to /wp-content/plugins/.
    • Activate the plugin via the Plugins menu in WordPress.
    • Go to Settings > Custom Thumbnail Generator to configure your image sizes.

FAQ

Will this delete existing thumbnails?

No. Removing a size only prevents future generation. Existing files remain untouched.

Does it support multisite?

Yes, activate network-wide to manage thumbnails across subsites.

Can this generate or regenerate a single thubnail size?

Yes, the plugin allows you to create and generate a specific thumbnail size instead of always using in bulk option.

Can theme generated thumbnails be deleted?

No. Option to remove any thumbnail size registered by a theme or WordPress core is not possible.

Is there any restriction on the number of thumbnail sizes that can be created?

No. There is absolutely no restriction on the number of thumbnail sizes. Unlimited number of thumbnail sizes can be registered and made avaialble across all themes.

Reviews

سپتامبر 15, 2025
I did a test run of this plugin today and it really does make handling image sizes super easy. Nice and lightweight, works smoothly. curious to see how it shapes up with future updates.
Read all 1 review

Contributors & Developers

“Custom Thumbnail Generator” is open source software. The following people have contributed to this plugin.

Contributors

Changelog

1.0.0

  • Initial release
  • AJAX table loader and thumbnail manager
  • Nonce validation and security best practices