World Builder is a simple prompt building tool to help you flesh out your world building.
Foundation
Choose the physical container of your world. Every world has a shape. Select the one that feels closest to yours.
Era
Choose the time layer. This is the aesthetic and historical feel sitting on top of your foundation.
One word that captures the emotional feel of your world. Select one below or type your own.
Build
Define the structure of your world — its regions, rules, powers, and fault lines.
Each region has a character. What makes it distinct from the others?
Every world has something that makes it unlike ours. A force, a law, a system that shapes how people live and what they are willing to fight for.
A faction is any group with a shared goal and a reason to fight for it.
Not why they hate each other -- what is the actual thing at stake?
One thing happened before your story begins that everyone alive remembers. A war. A collapse. A disappearance. A failure. It doesn't need to be explained yet. Just named.
Generate Your Prompt
Assemble everything you have filled in into a complete AI prompt. Copy it and paste it into Claude, ChatGPT, or Gemini.