Convert3D is a free, browser-based converter for common 3D model formats — .obj, .fbx, .stl, .gltf, .glb, .ply, .dae and others. Drag and drop a file in, pick the target format, and download the result. Everything happens client-side in the browser, so models never leave your machine.

It's a small single-purpose utility for 3D artists, game developers, and anyone who occasionally needs to move a mesh between toolchains without firing up Blender or paying for a desktop converter. No account, no upload limits, no watermark.