This is a third-party script/app and is not created by the WaniKani team. By using this, you understand that it can stop working at any time or be discontinued indefinitely.
Wanikani Forums: Large Image Embedder
This is a script which re-embeds large images which the forums refuses to embed because they are too large. Works for normal images as well as gifs. You should, however, be aware that there is a reason as to why Discourse chooses not to embed these. They are heavy, take time to load, and slow down your experience. It does make life a lot easier, though.
I can’t guarantee this works 100% of the time, but it’s pretty damn close, and if you happen upon a broken image that hasn’t been fixed you just have to scroll up and down a bit until it fixes itself.
This is a very nice userscript. On the other hand, I also have to say that the Discourse 3 MB limitation has forced me to learn a bit about animated gif editing with gifsicle, which is also quite interesting. You can crop the image, control the speed, cut for length, etc. If you don’t mind tinkering a bit with command line tools, gifsicle is pretty cool.