What are free tools for simplify isometric 3D models?

Free tools to simplify isometric 3D models include Blender, Meshmixer, and Windows 3D Builder. Blender uses its Decimate modifier to reduce polygon count while preserving isometric shapes; Meshmixer’s Reduce tool lets you adjust detail levels quickly; 3D Builder offers a straightforward one-click “Simplify” option for basic edits. If you’re new to 3D editing, start with 3D Builder for ease, or Blender if you need precise control over your isometric model’s simplification.