The story behind the free floor plan editor
A browser-based floor plan CAD tool, built for speed and precision.
The story
I built Gridsnap because I couldn't find a good free floor planner that works online. I needed to create plans and drafts quickly — sketch out a room, place some furniture, get the measurements right — without downloading software or paying for a subscription.
The existing options were either too expensive, too slow, required a desktop install, or locked basic features behind a paywall. So I built the tool I wanted to use.
The technology
Gridsnap is built with modern web standards — React, TypeScript, HTML5 Canvas and WebGL. Underneath sits a real geometry kernel: integer-millimetre coordinates, solved wall joins, and a single geometry pipeline that drives the canvas, the 3D view, the elevations and every export — so what you print is exactly what you drew.
The app is local-first: drawing, 3D and every export run entirely in your browser, and plans live on your device by default. Signing in is optional — it syncs your projects to your account with automatic version history, so they open on any device and an accidental overwrite is always recoverable.
The philosophy
Speed and simplicity come first. The most important thing about Gridsnap is how easy and fast it is to put a plan together. Open the editor, start drawing walls, drop in some doors and furniture, add dimensions — done. No tutorials needed, no complex setup.
Precision is built in, not bolted on. Every measurement is in millimeters. Snap to grid keeps things aligned. But the tool never gets in your way — it should feel fast, not fiddly.
Open the editor. Draw the first wall.
No download, no account, no watermark. Your plan is measurable, printable and shareable from the first click.