Free OBJ to STL Converter

Meshy's OBJ to STL converter is built for 3D workflows. It runs entirely in your browser — no installs, no signups required — and preserves geometry, materials, and mesh structure during conversion. Whether you're preparing game assets, 3D printing, or 3D Animation, Meshy handles the format handoff cleanly, so you can stay focused on creating. Not sure which format fits your use case? Check out our 3D file format guide.

Free users can convert one file at a time. Pro users can process multiple files in a single session with faster turnaround. If you need batch conversion for a larger pipeline, check out Meshy's API for programmatic access.

Yes. Your files are processed locally in your browser and are not sent to or stored on external servers. If you're working with sensitive or proprietary models, see our Privacy Policy for full details.

Before converting, keep these in mind: Data loss between formats — STL may not support certain material channels, animation rigs, or metadata present in OBJ. Review our 3D file format guide to understand what each format supports before converting. Watertight geometry for 3D printing — If you plan to use the output for 3D printing, check that your model is manifold (watertight) before uploading. External textures — Textures referenced externally in OBJ files may need to be packed or re-linked after conversion. Meshy automatically transfers embedded textures, but external texture files require manual processing. Scale units — OBJ and STL sometimes use different default unit systems. Review your model's scale after conversion, especially if importing into a game engine like Unity or Unreal Engine.

Yes. Once converted, you can use your STL file directly with other Meshy tools — including the AI Texture Generator to apply new surface materials, the 3D Viewer to check your model, and the retopology and remesh features available in the Meshy workspace. The STL format is compatible with the full Meshy 3D pipeline.