Basic Box generator
Set the dimensions and material thickness, see the assembled box in 3D, choose flat, finger or T-slot joints, and download a ready to cut SVG or DXF. Everything runs in your browser.
Drag to rotate the 3D box, scroll or pinch to zoom. T-slot is beta - it adds bolt holes and captive nut pockets, so always cut a small test on scrap and check the fit before cutting the whole box.
Files are processed in your browser and never uploaded.
How to use Basic Box generator
Enter your figures
Fill in Number (d), Number (h), Material thickness and Finger size. Values you change are used straight away, with no submit button.
Adjust the assumptions
Fine-tune Bolt diameter, Kerf (mm), Router bit diameter (mm) and Cut colour to match your own situation.
Read the results and keep a copy
The totals and the breakdown below them update as soon as a value changes. Press Download SVG, Don → to save or share the result.
What this tool does
Open or closed, flat / finger / T-slot joints, inside or outside
Choose an open tray or a closed box with a lid, then flat, finger or T-slot joints, and whether the dimensions you type are the inside or the outside of the box.
Live rotatable 3D box preview - drag, scroll or pinch
The 3D preview shows the box assembled before you cut anything. Drag to rotate, scroll or pinch to zoom, and switch back to the flat plan whenever you like.
Kerf, fit, dogbone corner compensation, colours and line width
Kerf, joint fit and dogbone corners compensate for the width of your blade or bit, and cut, inside-cut and label colours plus line width match what your machine expects.
Separate or combined layout, single file or zip of panels
Lay the panels out separately or combined, and take them as one file or as a zip with a file per panel when your workflow needs them apart.
Machine bed size check, SVG and DXF, nothing uploaded
The layout is checked against your machine bed size before you export, and both SVG and DXF are written by your browser with nothing uploaded.
Frequently asked questions
Is my box design uploaded anywhere?
No. The generator, the 3D preview and the export all run in your browser. Files are built on your own device and nothing is uploaded or stored.
What files can I download?
A flat SVG and a DXF at true millimetre scale, as a single file or as separate files per panel in a zip. They open in laser and CAD tools like Glowforge, xTool, LightBurn, Inkscape, Illustrator and Fusion. Cut lines, inside cuts and labels are kept on separate layers and colours.
What joint types are there?
Flat edges for a glued box, finger joints for a press fit box, and T-slot for a bolt together box with captive nuts. T-slot is a beta feature, so test the fit on scrap first.
How do I get the joints to fit?
Joint fit depends on your machine's kerf, the cut width the laser removes. Cut a small corner on scrap of the same material, then adjust the Kerf value or switch the Fit between Loose, Standard and Tight until the parts press together snugly. For a CNC router, set Cut compensation to Corner and enter the bit diameter to add dogbone relief.
How do I use the 3D preview?
The 3D box opens by default. Drag to rotate, scroll or pinch to zoom. It updates live as you change the dimensions so you can check the look and the joints before cutting, then switch to Flat plan for the cut layout.
What do the machine and layout options do?
Panel layout can keep panels separate or pack them closer together. File output can give one combined file or separate files per panel. The machine bed size warns you when the layout is larger than your cutter's work area so you can scale down or split the job.
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