STL ExtrudeLab

What it does

STL ExtrudeLab is a light, browser-based tool that lets you extend and adapt existing 3D mesh models like STL, OBJ, and PLY. Downloaded a model that's almost perfect? Just extend it, select any surface, extrude it into pipes, channels, or angled extensions, right in your browser. No install. No CAD skills. No Blender rabbit hole. Just load your STL, pick a surface, drop some waypoints, and export print-ready in minutes. Free, offline-capable, files never leave your machine.

STL ExtrudeLab is a light, browser-based tool that lets you extend and adapt existing 3D mesh models like STL, OBJ, and PLY.

STL ExtrudeLab lets you load existing 3D meshes (STL, OBJ, PLY, GLTF), select a surface, and build clean extensions like pipes, brackets, and connectors – all in your browser. Perfect for 3D printing hobbyists who want to adapt downloaded models without learning complex CAD software. Focused tools for extending existing meshes – not a full CAD system, just what you need to adapt and tweak STL files for 3D printing. Load STL, OBJ, PLY, or GLTF/GLB models. Everything is converted into a unified mesh format that you can work with directly in the browser. Supports files up to 50MB. Click to pick surfaces, extract edge loops automatically, and tweak them with simple edge editing so your…from stlextrudelab.com

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