Greasy Fork is available in English.
Automatically downscale images based on custom presets. Features image cropping and WebP conversion. Requires 4chan X.
This script does not work with Greasemonkey. I encourage you to switch to another userscript manager.
I'm not seeing any options besides Settings when I open the side menu and clicking it does nothing. I'm using the Greasemonkey version of 4chanX, in case that might have anything to do with it.