3D Box Generator
Open-source box maker with dividers, three lid styles and engraved lid text
Opens javisperez.github.io
About 3D Box Generator
This free, open-source box generator by Javier Perez runs entirely in your browser, so nothing is uploaded. You set width, depth and height up to 200 mm, wall thickness and chamfers, then add up to ten dividers in each direction and drag them where you want. Finger slots can be cut into the walls so cards or coins are easy to pinch out.
Three lids are available: a cap that drops into the box, a drawer-style sleeve the box slides into, and a hinged lid with pin-less snap hinges. The lid can carry engraved or raised text and emoji, or a cut-out pattern. Helpers size a box from a target volume or from the items you want to store, a printer check warns if a part will not fit your bed, and each part exports as its own STL with a filament estimate.
It is a young hobby project with a small following, but it is polished and generous for a free tool. It suits anyone who wants a quick custom box without an account.
What you can make
- Boxes with dividers
- Hinged-lid boxes
- Sleeve (drawer) boxes
- Engraved lids
How to use it
- Open the site and set the box size
- Add dividers and finger slots
- Pick a lid style and add text if you like
- Export each part as STL
Good
- No account, runs locally in the browser
- Hinged, cap and sleeve lids
- Volume and compartment calculators
Not so good
- Small, newer project with little community feedback
- Maximum size 200 mm per side
- STL only
What you'll need to print it
Materials and parts that give the best results with 3D Box Generator.
PETG for functional and outdoor prints
PETG handles heat, sunlight and repeated flexing better than PLA, so Gridfinity bins in a hot garage or signs mounted outdoors keep their shape.
- Bambu Lab PETG BasicUpgraded formula that Bambu says matches PLA Basic for strength while staying impact-tough; low price per spool in multi-roll bundles.
- Polymaker PETGHigh-flow replacement for PolyLite PETG: strong, low-odour and quick to print.
- Overture High Speed PETGGood-value PETG in a large colour range for functional parts in bulk.
Matte PLA for signs and Gridfinity
Matte filament hides layer lines and cuts glare, so raised lettering on signs and nameplates stays readable from any angle and a drawer full of bins looks uniform.
- Bambu Lab PLA MatteWide colour range with AMS-ready RFID, ideal for multi-colour signs.
- Polymaker Panchroma Matte PLA (formerly PolyTerra)The former PolyTerra line under a new name: soft matte look and good value for printing Gridfinity in bulk.
- SUNLU Matte PLALow-cost matte option for large batches of bins and baseplates.
M3 screw assortment
M3 is the default fastener size for printed enclosures, hinges and mounts; a sorted kit of lengths saves a hardware-store trip whenever a model calls for bolts.
- Bambu Lab Fastener KitMixed self-tapping and machine screws with nuts, matched to Maker's Supply projects.
- Hilitchi M3 socket head cap screw assortment kitClassic boxed M3 assortment with nuts and washers in many lengths.
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