3D Print Tools
A toolbox that runs entirely in your browser — nothing is uploaded anywhere. Load an STL to inspect it, scale it, estimate cost, and (the fun part) turn it into a sand castle mold: a printable negative you pack with wet sand and flip over at the beach.
Drop an STL file here, or click to choose one
Binary or ASCII STL · stays on your device
Drag to orbit · scroll to zoom · right-drag to pan. Rotate the model so it stands “up” the way it should sit on the sand before generating a mold.
📐 Model stats
- File
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- Size (X × Y × Z)
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- Volume
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- Surface area
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- Triangles
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Fits on common printers?
📏 Scale & export
Exports include any rotation/scaling you applied here. Units are millimeters (standard STL convention).
🏖️ Sand castle mold maker
Generates a printable negative of your model — a bucket-style mold. Pack it with wet sand, flip it over, lift, and your model appears in sand. The generator views the model from above (overhangs are automatically filled in, just like a real sand mold requires), and the result prints flat-side-down with zero supports.
💰 Print cost & time estimator
- Estimated weight
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- Filament used (1.75mm)
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- Material cost
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- Rough print time
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Rule-of-thumb estimate (walls ≈ 15% of solid volume plus infill). Your slicer has the final word.
🎁 Ready-to-print designs
Finished models with multi-colour files, print times and filament estimates.
Leshem Yichud tefillin card · לְשֵׁם יִחוּד
The full Leshem Yichud before tefillin, with nikkud, in white on a navy card with a gold frame and the SCP logo. Three colours: AMS-ready 3MF, or two filament swaps on any printer. Pocket and standard sizes for the A1 mini (≈ 54 min and 78 min), and a display plaque for 256 mm beds.
✨ Generators
No STL? Make one. Each generator loads its result into the workspace above, where you can scale it, price it, export it — or turn it into a sand mold.
🖼️ Lithophane
Turn a photo into a relief that reveals the image when backlit. Print in white, 100% infill, standing vertically.
🔳 QR code plaque
A scannable QR code as a printable plaque, previewed in its print colors. Multi-filament printer (Bambu AMS etc.)? Download the two-STL version below, import both files as one object, and assign white/black filaments.
🔤 Name tag / stamp
Raised text on a plate — keychain tag, label, or a mirrored stamp. Sand-mold it to write names in sand.
🧵 Filament converter (1.75 mm)
Handy for “is there enough left on this spool?” moments.
🏖️ Sand mold tips
- Slice with 2–3 walls and 5–10% infill — the mold is mostly shell, so it prints fast.
- Smoother cavity = cleaner castle: try 0.16 mm layers, or sand the inside lightly.
- Use wet “drip-castle” sand or kinetic sand. Pack firmly, tap the sides, lift straight up.
- A quick spray of water (or a wipe of oil) inside the mold helps release.
- PETG or ASA survives a hot beach better than PLA.
- Also works with snow, chocolate, and jello — but only food-grade printed parts for the last two!