Upload a model.
Download a proven mold.
MoldCreator turns any STL or OBJ into a print-ready two-part mold or silicone pour tray — hugging bodies, pins, sprue, air vents, clamp bolts — every cavity CSG-verified, in seconds, right in your browser.
No credit card needed · 2 tokens per mold · STL in, STL out
100%
cavity integrity, CSG-verified on every mold
30–60%
material saved by hugging molds vs a box
0 mm³
stray void — the cast is your part, nothing else
Everything a mold needs, automatically
You bring the shape. MoldCreator handles the mold-making engineering.
Hugging molds save material
Instead of a bulky box, shrink-wrap the mold around your part — typically 30–60% less resin or silicone, with the exact wall thickness you asked for.
Proven, not just generated
Every mold ships with CSG proofs: 100% of the part captured as cavity, zero stray void, and a pour channel verified to reach the cavity.
Sprue + auto air vents
A cone-shaped pour funnel is placed over a reachable high point, and thin vents are cut at trapped pockets so air escapes as the pour rises.
Pins & clamp bolts
Alignment pins with matching sockets — each one CSG-checked before it's kept — plus optional M3 through-holes to bolt or band the halves shut.
Demoldability insight
A live undercut readout shows how much of the surface releases cleanly for any axis, parting position, and orientation — before you spend a token.
STL & OBJ, repaired for you
Drop in binary or ASCII STL, or OBJ. Broken meshes get welded, holes filled, fragments rescued; dense ones simplify with a live preview.
Silicone tray molds
The second tool: an open-top tray with your part fused to the floor. Pour silicone, peel, cast — with the exact pour volume computed before you print.
Seconds, in your browser
The geometry kernel runs as WASM right on your machine. No queue, no upload wait, no CAD skills — slice through the result in live cross-section.
Mold library
Every generation is saved to your private history — reopen any mold in the 3D viewer or re-download it, on any machine, anytime.
Three steps to a finished mold
Import your model
Drag in an STL or OBJ — a figurine, a part, a prototype. Auto-repair and simplify handle imperfect meshes.
Tune & verify
Pick the body (box or hugging), parting plane, pins, sprue, vents, and bolts — with live demoldability and 3D preview.
Print, clamp, pour
2 tokens buy both halves as print-ready STLs, with CSG-verified cavity and pour channel. Print, clamp, pour, done.
Simple token pricing
Buy tokens once, spend 2 per mold. New accounts start with 6 free tokens.
Your next cast starts with one upload
Join the makers casting silicone, resin, chocolate, and concrete from molds they generated in seconds.
Create your free account