Edit an Existing Floor Plan Online
Don't redraw from memory — trace the plan you already have and make it editable
Most floor plans don't start from a blank page. You have something — the estate agent's PDF, a blueprint from the archive, a photo of a plan taped to the wall, or your own pencil sketch. Gridsnap's trace mode turns that picture into a real, editable plan: import it, set the scale, and draw over it.
A scanned sketch mid-trace: the left half is already a real CAD model; the right half is still pencil.
From Picture to Plan in Four Steps
Import your existing plan
Drop in a photo or scan of the plan — a JPG or PNG. Working from a PDF? Take a screenshot of the page and import that. The image appears as a faded underlay beneath the drawing grid.
Calibrate the scale
Click two points on the underlay whose real distance you know — a wall you've measured, or a printed dimension — and type it. From then on, everything you trace is at true scale, in real millimetres.
Trace the walls
Draw over the underlay. The snap engine keeps walls straight and corners exact even when the scan is skewed or the sketch is wobbly — you trace the intent, not the pencil line.
Edit, furnish, export
Now it's a real CAD model, not a picture: move walls, try a new kitchen, knock through a partition, add furniture. Export a clean vector PDF at scale, a DXF for an architect, or a PNG to share.
Why Trace Instead of Redraw?
Because the original already contains the answers. Positions of walls, doors and windows are all there — what the picture can't do is change. Tracing keeps the information and adds editability: once traced, rooms report their real net area, dimensions anchor to the geometry, the plan becomes a 3D model with elevations, and every wall can be moved with exact millimetre control.
That makes trace mode the fastest route to a renovation plan: trace the flat as it is, duplicate the file, and redraw just the parts you want to change — then hand both "before" and "after" to your builder as measurable, to-scale vector PDFs.
Common Questions
Can I edit a PDF floor plan?
Not directly — a PDF floor plan is just a picture of a plan, so no tool can truly "edit" it. The reliable way is to take a screenshot of the PDF page, import it into Gridsnap as an underlay, calibrate the scale, and trace over it. Ten minutes later you have a real, editable model — and your export is a fresh vector PDF, cleaner than the original.
Can I make a floor plan from a photo or hand-drawn sketch?
Yes. Import the photo, calibrate it against one known measurement, and trace the walls. The snap engine straightens wobbly pencil lines and skewed camera angles as you go.
Is editing floor plans in Gridsnap free?
Yes — importing an underlay, tracing, editing and exporting (PDF, DXF, PNG) are all free, with no watermarks and no account required.
Can I edit a floor plan made in another program?
If you can get an image of it — a screenshot, scan, or photo — you can trace it into an editable Gridsnap model. There is no direct DXF/DWG import yet, so the trace workflow is the way in from other tools.
New to drawing plans? The step-by-step guide covers measuring and drawing from scratch, and the floor plan symbols guide explains what everything on the original drawing means.
Got a plan to trace?
Import it, calibrate, and draw over it — free, no account needed.
Open Gridsnap Editor