This plugin add new editor for generating thumbnails with letterbox style. Background color for letterbox style sets in settings.
As of April 2026, Letterbox Thumbnails is a WordPress thumbnails plugin with 10 active installations and a 5/5 rating from 2 reviews. It has been downloaded 3.8K+ times in total. Requires WordPress 4.5.0+ and PHP false+. Available on WordPress.org since 2013. Last updated 6 years ago — may have compatibility concerns. Top alternative: Regenerate Thumbnails.
This plugin add new editor for generating thumbnails with letterbox style. Background color for letterbox style sets in settings.
| WordPress | 4.5.0+ requiredTested up to 5.2.24 |
| PHP | false+ required |
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.
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