3d mold maker for production-ready molds from your 3D models

Turn existing 3D files into accurate mold systems with less material and less manual setup.

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A guided path from model preparation to clean, printable mold components.

Simple workflow

From 3D model to ready-to-print mold in just a few clicks

Import your model

Start from the 3D files you already have, including STL, OBJ and other common formats.

Generate the mold system

Create adaptive mold boxes with splits, clamps, funnels, channels and production-ready supports.

Print, assemble and pour

Print the parts, assemble the system and pour silicone through a fast, clean workflow.

Mold systems

The right mold system for every model

Choose a proven starting point, then adapt splits, channels, bases and production settings to your project.

General purpose

Adapted box

A balanced, material-efficient system for most models and everyday silicone mold production.

Yellow bird sculpture surrounded by a fitted white mold box with alignment points.

Slip casting

Generate shape-aware funnels and feet, cut the top of the piece and handle undercuts automatically for direct or silicone mold systems.

Tray box

An open mold system for flat-backed parts and straightforward single-pour projects.

Lavender open tray mold holding several rounded forms.

Multi-part silicone

An enclosed multi-part silicone system for forms that need controlled parting lines.

Inner cavity

Automatically generate shape-adapted inner cores for hollow castings and vessel-like forms.

Direct-mold open base

Build a direct-printed mold with an open base for accessible pouring and extraction.

Blue direct-printed open-base mold with a visible sculpted interior.

Direct-mold top funnel

Create a direct-printed mold with an integrated top funnel and controlled fill path.

Blue direct-printed mold with an integrated top funnel and fill path.

Direct skin mold

Generate a direct-print mold and matching core for creating flexible skins over any 3D model.

Fixture

Generate a custom fixture from your 3D model to hold parts securely for precision work.

Protective shell

Create a fitted protective box that keeps delicate finished models safe during shipping and storage.

Design capabilities

Production control without the modeling overhead

Solve difficult preparation work inside one guided mold-making workflow.

Light green sculpted master with a blue smart seal along its base.

Master smart seal

Automatically close gaps and open areas around the master, creating a clean, watertight connection with the mold base while helping prevent air traps.

Bright green reusable casting box with curved support walls.

Efficient casting boxes

Create a support box for the silicone mold without printing a completely new conventional mold box every time, making repeated production faster and more material-efficient.

Pale mold base with small green alignment keys positioned around a sculpted master.

Automatic smart base key placement

Automatically position secure base keys around unfixed masters, keeping them stable and correctly aligned during molding.

Clear extraction

Automatically remove undercuts along the selected extraction direction for easier demolding and safer master removal.

Gold rectangular branding plate with a raised letter A, and volume text.

Custom branding

Add logos, custom text or casting-volume information to molds and master models, placing and scaling them freely as engraved or raised details.

3D mold workspace showing adjustable colored split planes around a sculpted model.

Unlimited custom splits

Add, position and refine as many split planes as your model needs, giving complex forms a controlled and practical mold layout.

Close 3D view of a mold edge with green volume markings and casting information.

Silicone and casting calculator

Calculate mold volume, estimated silicone requirements and casting capacity before production, with optional engraving on the generated mold.

Orange mold roof supported by green pillars placed beneath trapped islands.

Automatic air-trap support pillars

Automatically detect trapped islands and place support pillars beneath them to prevent air traps and improve casting reliability.

Foundation

Create a solid, printable base directly on flat-bottomed master models, then generate and join the foundation in one guided step.

Cleaned and repaired sculpted mesh prepared for reliable mold component generation.

Safe mesh processing

Repair, clean and simplify difficult source geometry before turning it into reliable, manifold mold components.

Orange ready-to-print mold components arranged in a 3D workspace.

Ready-to-print STL export

Export every generated mold-system component as a separate ready-to-print STL file in one action.

Three blue adjustable channel configurations arranged around a yellow sculpted form.

Balanced blue channel configuration surrounding a yellow sculpted form.

Blue support channel configuration shown around a yellow sculpted form.

Extensive configuration options

Customize casting systems, alignment, channels, fit, pressure and size so complex models behave the way your production requires.

Detailed pale sculpted planter form with an open top and textured ornamental surface.

Auxiliary molding tools

Speed up your workflow with smart utilities for planters, hollowing, batch mold production, casting sprues and more.

Watch the workflow

3dmoldmaker in action

Yellow bird sculpture inside a fitted mold box.

From model to mold system

Blue direct-print mold with an open base.

Build a direct-print mold

Light green master with a smart blue seal.

Close gaps automatically

Protective shell opened around a sculpted vessel.

Protect delicate finished parts

Gold branded plate with raised lettering and volume information.

Add production details

White slip-casting mold around a flowing sculpted shape.

Shape-aware slip casting

Pale mold base with green alignment keys.

Keep the master aligned

Blue multi-part silicone mold components.

Control the parting line

Sculpted form prepared for a clear extraction direction.

Plan a safer extraction

Estimate the casting volume

Orange mold roof supported by green pillars.

Reduce trapped air

Sculpted master joined to a printable blue foundation.

Build a stable foundation

Cleaned sculpted mesh prepared for mold generation.

Prepare difficult geometry

Orange mold components arranged for printing.

Export the finished parts

Detailed ornamental planter form with an open top.

Explore auxiliary tools

Ready to build

Turn your next model into a production-ready mold

Start with a 3D model and move through a guided workflow for cleaner mold systems and more reliable production.

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Community

Join the 3dmoldmaker community

Share workflows, get practical help, request features and meet creators working with molds, casting and 3D printing.

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