RenderPen

Turn CAD models into interactive online 3D presentations.

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March 7, 2026 Hand-crafted, not vibe-coded!

Hey everybody! RenderPen lets you quickly turn CAD models into multi-page guides featuring step-by-step instructions, cutaways, highlights, labels, and animations. Simply drop in your GLB file (exported natively from SolidWorks, Autodesk Inventor, Blender, etc.), annotate, and publish— perfect for product demos, assembly instructions, training tutorials, etc. Help your customers understand complex products faster.

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I built this product for OEMs who already have great CAD models but need a simple way to share them online. This lets you quickly create interactive 3D presentations- and they work great on mobile.