What does mesh simplification do?
Mesh simplification reduces the number of vertices and triangles used to represent a 3D shape while trying to preserve its visible form as closely as possible.
CAD & 3D
Mesh Simplifier
Reduce the polygon and triangle count of STL, OBJ, and 3MF models online. Simplify 3D meshes locally while preserving their overall shape.
Tool
Mesh Simplifier
Reduce the polygon and triangle count of STL, OBJ, and 3MF models online. Simplify 3D meshes locally while preserving their overall shape.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this free online Mesh Simplifier to reduce the number of triangles in STL, OBJ, and 3MF models. Choose a target triangle count or reduction percentage, preview the optimized result, compare the original and simplified mesh statistics, and download a smaller model for faster viewing, sharing, printing, or further processing. Simplification attempts to preserve the overall shape, but fine details may be removed at stronger reduction levels. All processing runs locally in your browser.
Examples
- cylinder.obj
- cube-binary.stl
- multi-object.3mf
Frequently Asked Questions
Why should I reduce the triangle count?
A lower triangle count can reduce file size, improve viewer performance, speed up transfers, and make models easier to process in other applications.
Will simplification change the shape of the model?
Some geometric change is unavoidable when triangles are removed. Moderate reductions often preserve the overall appearance, while aggressive reductions can remove curves, edges, holes, embossed text, and other fine details.
Can I choose the target polygon count?
Yes. You can simplify by a reduction percentage or by selecting a target triangle count, depending on the available controls.
Are sharp edges preserved?
The simplifier can attempt to preserve important boundaries and prominent features, but sharp edges may become softer or less accurate at high reduction levels.
Does simplification repair damaged geometry?
No. Simplification reduces mesh complexity but is not a complete repair process. Holes, self-intersections, non-manifold edges, and disconnected parts may remain.
Which output formats are supported?
The simplified mesh can be exported to a supported mesh format such as STL, OBJ, or 3MF, depending on the selected output option.
Is my model uploaded?
No. Simplification and export run directly in your browser.