There's no widely known standalone "Alpha to 255" plugin, but these options work:
Example Reference Implementation (conceptual C# pseudocode) paint net alpha to 255 plugin download
In Paint.NET , "Alpha to 255" refers to removing transparency from an image by making all pixels fully opaque. While there is no single plugin with exactly that name, several community-developed tools achieve this effect by modifying the alpha channel. Primary Plugin Recommendations There's no widely known standalone "Alpha to 255"
The plugin saves 3-4 minutes of manual curve adjustments per image. For batch processing, the plugin is irreplaceable. the plugin is irreplaceable.