Make your first box
Box Maker makes an open-top box from five numbers. It takes about a minute.
In a hurry? Pick one of the examples above the sizes (a sticky note holder, an AA battery box, a drawer tray and more) and change it to suit.
- Enter the outside size. Length, width and height in millimetres, from 10 to 300 mm each. These are outside measurements, so the box fits the drawer or shelf it's going into.
- Set the walls and floor. 2 mm is a sturdy default. The inside size updates as you type.
- Check the preview. Drag to turn the box, scroll or pinch to zoom. The Top, Front and Side buttons show flat views with the sizes marked.
- Pick your printer and settings under the preview. A green line means it fits your printer's bed.
- Download. The orange button gives you a 3MF set up for your printer; STL and GLB are beside it.
Give the box a name before downloading and the file is named after it, like drawer-tray-kobra-x.3mf.
Saving a design
Press Save box to keep the sizes so you can change them later. Saved boxes are listed under the preview; click one to load it. Save as a new box keeps both versions.
On the free plan, saved boxes stay in this browser. On a paid plan they're in your account.
Last updated 2026-11-06