Planagonia

Floor plan generator

As fast as a sketch.
As exact as a plan.

Sketch out your next apartment, a campervan interior, or a garden layout — move something on screen, and the small program behind it updates to match; change a number in that code, and the drawing follows. Want to nudge something to the exact centimeter, or let an AI write the first draft? Either way, nothing here is a black box you can't reach into.

Free, no account needed — try it right now.

↳ the plan behind it

element bed { shape: "rect" size: [1.6m, 2m] position: [0.3m, 0.4m] }

Why it's not just a drawing tool

Not a general drawing tool with a scripting layer bolted on — every part of it was designed around sketching fast without losing control of the exact numbers.

01

Two views, always in sync

Move something in the drawing and the code updates to match; change a number in the code and the drawing follows. Neither one ever quietly falls out of sync with the other.

02

Built for real layouts, not general drawing

No CAD learning curve, no general-purpose canvas to wrestle with — describe a room, a campervan, or a property boundary directly, in real-world units from the start.

03

Full control, down to the exact number

Every measurement is a real, editable value, not a locked-in shape. Type a precise change directly, drag it into place, or hand the whole layout to an AI to draft — review any of it against the live drawing before you trust it.

Written to be authored by AI, reviewed by you

Describe what you want to an AI assistant — today, that's your own ChatGPT or Claude conversation — then paste what it writes into the editor and check it against the live drawing. Planagonia's language favors precision an AI can generate unambiguously, so what you paste in usually just works.

It's still plain, readable source either way — open the app and edit it directly whenever you'd rather.

you describe ita room, a layout
→
AI writes the planPlanagonia's language
→
you review & adjustcode or drag-and-drop