GenTubeCreate Your Own Undertale OC Maker
Make a brand-new Underground monster or human with our free Undertale OC maker — quirky retro pixel and cartoon style, unlimited.
Undertale OCs Made With the Undertale OC Maker
From goofy skeletons like Sans and Papyrus to Flowey, Toriel, Frisk, and Undyne, fans bring the whole Underground to life here. Then they go further and dream up their own monsters and humans in that charming retro pixel and simple cartoon look. Make your own Undertale OC, free with no limits.
Follow your favorite Undertale creators
Real fans filling the Underground with skeletons, monsters, and original souls every day.
Frequently Asked Questions
An Undertale OC is your own original character set in the world of Undertale, the indie game by Toby Fox. It can be a brand-new Underground monster or a fallen human, with its own look, personality, and backstory, drawn in that quirky retro pixel and cartoon style.
Both. Make Sans, Papyrus, Frisk, Chara, Toriel, Undyne, Alphys, Asgore, or Flowey, or invent a fully original monster of your own. Mix and match looks until your OC feels right at home in the Underground.
Just say it in your prompt. Add words like retro pixel art, simple cartoon, indie game style, or undertale aesthetic, and the maker leans into that charming low-fi indie charm. Try a few prompts and remix the one you like best.
Yes. Make as many Undertale OCs as you want, totally free, with no credits, watermarks, or limits. Generate, tweak, and try again as many times as you like.
Yes. Post your OC to the GenTube feed, and anyone can remix it into new poses, scenes, or styles. You can remix other fans Undertale creations too, so the whole Underground keeps growing.
The best ones feel like they belong in the game: a clear monster type, a fun soul color or trait, and a bit of personality. Give your OC a name and a quirk, like a pun-loving skeleton or a shy ghost, and lean into that retro pixel charm.