Container CAD

What is Container CAD?

Container CAD is a free browser app for filling a drawer with plain, open-top printed boxes that fit it exactly. You type in the inside width and depth of the drawer, choose how the grid is divided, and then drag across the grid to mark where each container goes. A 3D view shows the whole drawer assembled, and a parts list groups identical boxes with their outer size and how many to print.

The useful part is the sizing math. You set one gap between the drawer walls and the outer boxes and another between neighboring boxes, and the app works out every container size from those. A stretch grid fills the drawer edge to edge with rectangular cells. A square grid keeps every cell square, so a box still fits after a quarter turn, and any leftover strip can take narrow partial containers. Height, corner radius, wall thickness and bottom thickness apply to all boxes.

It suits anyone with IKEA Kallax, kitchen or desk drawers who wants a tidy layout without Gridfinity baseplates. Files come out as STL, one per box type or several bundled in a zip. An account is only needed to save a project. Its maker announced it on Hacker News in September 2026.

What you can make

• Drawer organizer boxes sized to one specific drawer
• Open-top containers in 1x1, 2x1, 2x2 and other grid sizes
• Narrow partial containers for the leftover strip of a drawer
• A full drawer layout as a zip of STL files

How to use Container CAD

1. Open the editor and enter the inside width and depth of your drawer
2. Pick a stretch grid or a square grid and set the columns, rows or cell size
3. Drag across the grid to place containers of different sizes
4. Adjust height, corner radius, wall thickness and the edge and cell gaps
5. Download each part as STL, or select several and download them as a zip