Free tools for light packaging 3D models include Blender (with its Decimate modifier), SketchUp Free, and Vectary (for web-friendly exports).
These tools shrink file sizes by lowering polygon counts or compressing textures—ideal for web display, AR previews, or sharing without losing key details.
For beginners, Vectary’s simple interface or Blender’s Decimate tool are great starting points—they’re easy to use for basic light packaging tasks.