OpenPlan — 2D Floor Plan CAD in the Browser

2D CAD · In the browser

Floor plans, drawn like drawings.

OpenPlan is a fast 2D CAD for buildings. Millimetre-accurate walls, doors and windows, service layers, live areas and DXF export — on a sheet that reads like a printed drawing set.

Free · No account · No install

01 Click corner to corner — walls follow.
02 Close the loop — it becomes a room.
03 Odd-shaped wall? Trace its footprint — wall mass fills it.

Wall tool → wall mass, exactly as in the app.

Disciplines

One plan, every trade.

Architecture, plumbing, electrical and airflow live on layers in drafting-convention colours. Solo a discipline, lock it, print it.

LAYERS

Click a row — this is the app's layer panel.

Who it's for

Serious enough for work. Simple enough for a Sunday.

For professionals

AIA-style discipline layers with convention colours and lineweights
Millimetre-accurate geometry, typed lengths, angle locks
DXF in and out that survives the round trip
A drawing audit that flags unhealed joints and sloppy geometry
Print output that matches the screen — one palette, both media

For enthusiasts

No CAD manual — presets pick sane defaults for every element
Trace over a photo or a scan of your sketch
A furniture and fixture library that drops onto the sheet
Rooms and areas appear live as you draw
Everything undoes — pressing a tool is never destructive

Tooling

Small surface, real CAD.

Millimetre-true walls

Type a length, get real thickness. Corners mitre themselves.

Odd-shaped wall masses

Click any footprint's corners; it fills with solid wall.

Openings that cut

Doors and windows carve the wall and draw their own swing.

Snapping that commits

Endpoints, grid, angles. The halo shows where a drop lands.

Rooms find themselves

Closed walls become rooms. Areas update as walls move.

Drawing audit

One click flags unhealed joints and out-of-tolerance geometry.

The sheet is waiting.

No install, no registration, no login. The base functionality is free for everyone.

Open the app