3D Printable Box Generator
Create a parametric box STL online with real-time preview and one-click export. No CAD install required.
What Is a 3D Printable Box Generator?
A 3D printable box generator is a browser-based parametric design tool for makers, engineers, and students. Instead of manually drafting every dimension in CAD, you can input exact values and generate a clean model instantly. The generator is designed for custom storage organizers, open-top containers, and utility boxes where dimensions need to be exact.
Because it is parametric, each value updates the shape directly: length and width set footprint, height sets capacity, wall thickness tunes strength, bottom thickness adjusts rigidity, and corner radius improves ergonomics. You can build a custom box STL online, preview it in 3D, and export for slicing right away.
Box Generator Parameters
| Parameter | Range | Description |
|---|---|---|
| Length | 1–300 mm | Outer length of the box body. |
| Width | 1–300 mm | Outer width of the box body. |
| Height | 1–200 mm | Outer height of the box body. |
| Wall Thickness | 0.01–10 mm | Controls sidewall strength, weight, and print time. |
| Bottom Thickness | 0–10 mm | Controls base rigidity and first-layer tolerance. |
| Corner Radius | 0–200 mm (auto clamped) | Creates smooth rounded corners for safer handling. |
How to Use the Box Generator
- Set your target outer dimensions (length, width, and height).
- Adjust wall and bottom thickness based on print material and use case.
- Increase corner radius when you need rounded, easy-to-handle edges.
- Inspect the real-time 3D preview and rotate to verify proportions.
- Export STL and import into your slicer for final print settings.
Key Features
- Runs entirely in the browser — no CAD software or account needed.
- Millimeter-precision controls for enclosures, organizer bins, and project cases.
- Adjustable corner radius from sharp to fully rounded, with auto-clamping to valid range.
- Real-time 3D preview lets you verify proportions before committing to a print.
- One-click STL export ready to open in Cura, PrusaSlicer, or any standard slicer.
Box Generator FAQ
What wall thickness works best in this box generator?
Start at 1.6–2.4 mm for standard PLA or PETG prints. Increase to 3–4 mm for load-bearing enclosures or boxes larger than 200 mm in any direction.
How does corner radius affect the model?
A small radius (3–8 mm) replaces sharp edges with smooth curves, making the box safer to handle. Larger radii give a pill-shaped profile but reduce usable interior space. The tool auto-clamps the value so it never exceeds half the shortest side.
Can I set bottom thickness to zero?
Yes. Setting it to 0 generates a bottomless frame — walls only. This is handy for stacking sleeves, risers, or covers that slide over another part.
What file format does the box generator export?
The tool exports an ASCII STL file. The filename includes the outer dimensions (e.g. box_120x80x40.stl) so you can identify each variant quickly in your slicer.
Try More Parametric Tools
Need gears or fasteners? Continue with our dedicated tool pages, or open the homepage to use all three generators.