This plugin hasn’t been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Letterbox Thumbnails


This plugin add new editor for generating thumbnails with letterbox style. Background color for letterbox style sets in settings.


  • Upload new image to media
  • Letterbox thumbnails will be automatically generated with sizes that sets in settings.


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


How to change letterbox color?

Login as admin and go to admin settings. Click Letterbox Thumbnails link under Settings section. Set new color at the colorpicker box. Save settings by pressing save button.

How use letterbox style for some selected image sizes?

Go Letterbox Thumbnails settings page. In Image sizes section select images sizes for that you want use letterbox style. Save settings by pressing save button.


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Contributors & Developers

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


“Letterbox Thumbnails” has been translated into 1 locale. Thank you to the translators for their contributions.

Translate “Letterbox Thumbnails” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.

Change log

Version 2.0

Rewrite source code with more pro code style.
Remove colorpicker js library and using wp color picker.
Add settings to apply letterbox style for selected image sizes.
Ignore crop option for selected image sizes.

Version 1.0

Plugin generate thumbnails with letterbox style. Color for letterbox sets in settings.