The AI prototyping tool built for how AI actually works.
Most "AI prototyping" is a chat window that hands you code to take somewhere else. Prototyper is the somewhere else: your agents build on the canvas, the prototype runs in the workspace, and your team steers by pointing at things.
Describe it or sketch it
The agent builds it live, in real React, on the canvas in front of you.
It runs
Click it, type in it, break it, fix it. A prototype you can user-test the moment it exists.
Many agents, one surface
Branch three directions at once and keep what works.
Bring your own agent
Claude Code, Codex, or Cursor, on the subscription you already have.
From prototype to product on the same canvas
No export cliff. The code that ran in the prototype is the code you ship.
Frequently asked questions
- What is an AI prototyping tool?
- Software that turns a description or sketch into a working prototype using AI. The good ones produce real, running interfaces you can test, not images of interfaces.
- How is this different from v0 or Lovable?
- Those are interfaces that produce outputs you take elsewhere. Prototyper is the shared workspace where the output lives, runs, and keeps evolving.
- Do I need to know how to code?
- No. You describe the outcome; the agent writes the code and you steer by reacting to the running result.
Try it on the canvas
Free to start, no credit card. Bring the agent you already have.