Jack O Moon fanart is one of those niches where the quality really depends on where you look. I've spent hours scouring the internet for the best pieces, and my top recommendation would be platforms like Pixiv and ArtStation. Pixiv, especially, is a goldmine for Japanese-style artwork, and a lot of talented artists post their Halloween-themed or occult-inspired pieces there. Just search for 'Jack O Moon' in Japanese (ジャック・オ・ムーン) to get the most authentic results. ArtStation, on the other hand, leans more toward polished, professional work—perfect if you're into detailed, high-res illustrations. DeviantArt is another classic, though it can be hit or miss; filtering by popularity or using specific tags helps.
If you're into social media, Twitter (or X) and Instagram are great for discovering artists who specialize in this kind of aesthetic. Follow hashtags like #JackOMoon or #HalloweenArt to stumble upon hidden gems. Some artists also offer high-quality prints on their personal websites or stores like Redbubble, so if you find a piece you love, check if it’s available for purchase. I’ve bookmarked a few artists over the years who consistently deliver spooky, moonlit vibes—it’s worth curating your own little collection of favorites. And don’t forget niche communities like Tumblr or even Discord servers dedicated to dark fantasy art; sometimes the best stuff is tucked away in smaller circles.