Using Will It Fit? and protecting your saved work

How to get started, how saving in your browser really works, what can erase your projects, and a simple backup routine that keeps them safe.

Will It Fit? has no accounts and no online storage. That keeps it free and private, and it also means your projects live in one place: the browser you are using now. This guide explains what that means in practice and how to keep a safe copy.

Getting started in five minutes

On the home page choose Start My Home, or Try an Example Home to explore with sample rooms.
In My Home choose Add Room, pick a type and shape, and type the width and depth.
The Room Planner opens. Add furniture from the library, drag it into place, and type real sizes in the panel on the right.
Add doors, windows and radiators from “Doors, windows & obstacles”.
Read the checks under the plan. Fix any conflicts or decide they do not matter to you.

How saving works

Your projects are saved in this browser on this device. They are not automatically synchronized or backed up online. A moment after each change, the website writes your whole set of projects to the browser’s local storage, and again when you leave a page. The header shows the state: “Saved in this browser” with a time, “Unsaved changes…”, or a red warning if saving failed.

Nothing moves between browsers or devices on its own. A backup file is the bridge.

What can erase your projects

Clearing browsing data, cookies or “site data” for this website, by hand or with a cleaning tool.
Private or incognito windows. They forget everything when closed, and some block storage entirely. The website warns you when it cannot save.
Browser settings that delete site data on exit.
Uninstalling the browser or resetting the device.
Long periods without visiting. Some browsers remove data from sites you have not opened for a while.

Also remember that a different browser, a different device and a different web address each have their own separate storage. Opening the site on your phone will not show what you made on your laptop.

A simple backup routine

Open Downloads and Backups.
Choose Download full backup. A file named like will-it-fit-all-projects-2026-11-15.json is saved to your downloads folder.
Keep it somewhere you already back up, such as your documents folder or your own cloud drive.
Repeat after any session you would not want to redo.

To restore or move to another device, open the same page there, choose Import a backup file and select the file. Imported projects are added as new projects; nothing existing is replaced.

Worked example

You plan three rooms on a laptop on Saturday and download a backup. On Sunday you open the site on a tablet: My Home is empty, as expected. You send yourself the backup file, import it on the tablet, and the three rooms appear as a new project. Changes you now make on the tablet stay on the tablet until you export from there and import on the laptop, where they arrive as a second project next to the original.

Share links

“Create share link” in the planner packs one room’s shape, items and labels into the link itself. Nothing is uploaded. Anyone with the link can open the layout, the link never expires and it cannot be withdrawn once sent. Notes, costs, your furniture list and other rooms are not included. Very large rooms do not fit in a link; send a backup file instead.

Common mistakes

Planning in a private window and closing it.
Assuming phone and laptop share projects.
Importing the same backup twice and then editing the wrong copy. Rename projects in My Home to keep them apart.

If you see a saving warning

Choose Download a backup now in the warning before closing the page. Then check that you are not in a private window and that the browser allows site data for this website.

← All guides · Found a mistake? Email willitfitplanner@outlook.com.