Exporting STL from SketchUp for CNC & 3D Printing: Optimal Workflow

Best Plugins for STL Export in SketchUp (Free + Paid)

1. SketchUp STL (Official) — Free

• What it does: Adds native STL import/export to SketchUp.
• Best for: Quick, no-friction exports for 3D printing.
• Key features: Binary/ASCII export, units selection, export selection-only.
• Limitations: Basic mesh repair; not for advanced cleanup.

2. Solid Inspector² — Free

• What it does: Detects and highlights common solid/ manifold issues (holes, stray edges, reversed faces).
• Best for: Preparing models to be a “watertight” solid before STL export.
• Key features: One-click fix suggestions, integrates with SketchUp’s solid tools.
• Limitations: May not fix complex topology automatically.

3. Cleanup³ — Paid (small one-time fee)

• What it does: Optimizes and cleans geometry: removes duplicate edges/faces, merges coplanar faces, fixes stray geometry.
• Best for: Reducing file size and simplifying meshes pre-export.
• Key features: Batch operations, extensive cleanup options, speed improvements.
• Limitations: Advanced UI; over-aggressive settings can alter intended geometry.

4. Artisan Organic Toolset — Paid

• What it does: Sculpting and subdivision surface modeling; remesh and smooth tools.
• Best for: Creating high-quality organic meshes for printing and then exporting as STL.
• Key features: Subdivide, smooth, remesh, crease, symmetry tools.
• Limitations: Learning curve; increases polygon counts—may require decimation before export.

5. Vertex Tools — Paid

• What it does: Vertex-level editing for precise mesh control.
• Best for: Fine-tuning mesh topology to ensure clean exports.
• Key features: Move/slide vertices, weld, stitch, edge flow tools.
• Limitations: Desktop-modeling focus; not a dedicated STL tool.

6. Eneroth Solid Tools — Paid (affordable)

• What it does: Boolean operations and solid editing with better robustness than native tools.
• Best for: Creating true solids from complex assemblies before exporting STL.
• Key features: Improved intersections, unions, differences; works well with Solid Inspector².
• Limitations: Boolean operations can still create messy geometry in complex cases.

7. Instant Meshes Remesh (via extensions/workflow) — Free tool + workflow

• What it does: External remeshing tool to produce evenly distributed quads/triangles; used with export/import workflows.
• Best for: Remeshing high-poly Sculpt/Artisan outputs into cleaner topology for printing.
• Key features: Fast remeshing, preserves shape with better topology.
• Limitations: Requires export to intermediary format and re-import; extra steps.

Recommended Workflows

1. Use SketchUp STL for export.
2. Run Solid Inspector² and Cleanup³ to detect/fix manifold issues and simplify geometry.
3. For organic models: sculpt with Artisan, then remesh/decimate (Instant Meshes or external decimator) before final export.
4. Use Eneroth Solid Tools for robust boolean unions on assemblies.

Quick Tips

• Always work in millimeters for 3D printing.
• Make models a single solid (no internal faces).
• Reduce unnecessary polygons but keep sufficient detail for print resolution.
• Test small export and print slices before committing to large prints.