STL Hollow

STL Hollow Tool

Make your STL files hollow with customizable wall thickness. Perfect for resin 3D printing, material savings, and reduced print times using precise Boolean subtraction operations.

Hollow Your STL File

Upload an STL file and specify wall thickness to create a hollow version using Boolean subtraction. Perfect for resin printing optimization.

2mm

Minimum distance between outer and inner surfaces. Smaller values create thinner walls.

Drop STL files here or click to browse

Supports ASCII and Binary STL formats

Resin Print Optimization

Reduce resin usage by up to 70% while maintaining structural integrity. Perfect for large prints and material savings.

Boolean Subtraction

Uses manifold-3d engine for precise geometric Boolean operations, ensuring clean hollow cavities without artifacts.

Precision Control

Adjustable wall thickness from 0.5mm to 10mm with real-time validation to prevent invalid geometry.

About STL Hollow Tool and Boolean Operations

STL hollowing uses advanced Boolean subtraction algorithms to create hollow versions of solid 3D models. Our tool employs manifold-3d technology for professional-grade geometric operations with precise wall thickness control.

When to Use STL Hollowing:

  • Resin 3D Printing: Reduce material costs and print times for large objects
  • Architectural Models: Create lightweight building models with internal cavities
  • Prototyping: Test designs with reduced material usage and faster iterations
  • Art and Sculpture: Create complex hollow forms for artistic projects

Advanced Hollowing Features:

  • Wall Thickness Control: Precise thickness settings from 0.5mm to 10mm
  • Geometry Validation: Automatic checks to prevent invalid or unprintable results
  • Boolean Engine: Professional manifold-3d integration for reliable operations
  • Preview System: Visual feedback before committing to processing

Technical Implementation:

  • Manifold-3d Engine: Industry-standard WebAssembly Boolean operations
  • Outer Surface Detection: Automatic identification of external manifold boundaries
  • Scaled Inner Cavity: Precise inner surface generation with uniform wall thickness
  • Quality Assurance: Real-time triangle count and geometry integrity validation