Simplify3D

Simplify3D is a commercial slicing software for 3D printing. It converts 3D models into printer-ready G-code, enabling users to control how a model is printed. The software is available for Windows and macOS and is developed by Simplify3D LLC. It is used by hobbyists, educators, and professionals to prepare prints with detailed toolpath control and compatibility with a wide range of printers.

Its slicing engine emphasizes control: users can adjust layer height, shell thickness, infill density and pattern, print speed, travel moves, and extrusion width. It includes a sophisticated supports system with adjustable density, contact point size, and support type; it supports automatic generation and manual editing. It offers multi-extruder support and can manage color changes or material switching. The software can generate and preview toolpaths, simulate printed layers, and supports sequential printing to print multiple parts one at a time.

Inputs and outputs: Simplify3D imports common formats such as STL and OBJ and exports G-code compatible with many 3D printers. It provides per-object overrides so different models in a single file can use distinct settings. It integrates with printers via standard host interfaces and relies on external firmware on the printer for final operation. Mesh quality and repairs are typically performed in separate tools before importing.

Pricing and reception: Simplify3D is a paid product with a one-time license and paid upgrades for major versions. It is praised for its detailed control over toolpaths and reliable exports, but reviewers note a higher price than many free slicers and slower update cycles relative to flagship open-source projects. It remains in use in education and professional workflows, particularly where precise support structures and multi-extruder configurations are important.