MeshRefinery is a free online 3D model repair and conversion tool that diagnoses and fixes broken STL, OBJ, GLB, and GLTF files directly in your browser without uploading to a server.
What is MeshRefinery?
MeshRefinery is a browser-based tool that repairs non-manifold geometry, open edges, holes, and floating shells in 3D models. It accepts STL, OBJ, GLB, and GLTF files as input and outputs a watertight, slicer-ready model. All processing runs locally via WebAssembly, so your files never leave your device. The tool also offers format conversion between STL, OBJ, and GLB, and an AI-powered image-to-3D generation feature (30 credits per model).
Key Features
- Watertight repair — Fills small holes, removes floating debris, and fixes non-manifold edges so your slicer accepts the file.
- Format conversion — Convert between STL, OBJ, and GLB with no upload; every conversion runs locally.
- Instant diagnosis — Flags open edges, non-manifold geometry, floating shells, and degenerate faces in under a second.
- Live 3D preview — Rotate and inspect your model before and after repair or conversion.
- Free basic repair — The free repair rebuilds geometry watertight but drops vertex colors; deep repair (20 credits) preserves colors.
- Local-first processing — WebAssembly in your browser tab means zero server round-trip and no file retention.
- No account needed — Core tools work free without signup for single files.
Who is it for?
- 3D printing enthusiasts — Repair AI-generated models or scanned meshes that fail slicer checks.
- AI model generators — Users of tools like Meshy, Tripo, or Hunyuan who need to fix non-manifold output.
- Game developers — Convert and clean up assets for import into game engines.
- Any user needing format conversion — Quickly switch between STL, OBJ, and GLB without installing software.
What can you do with MeshRefinery?
- Repair broken AI models — Indie makers can fix models from image-to-3D generators, turning hundreds of thousands of open edges into watertight files ready for printing.
- Convert between formats — Designers working across Blender, Unity, and slicers can convert STL to OBJ or GLB and vice versa, all locally.
- Diagnose before printing — Hobbyists can run a free diagnosis check on any model to see exactly what's wrong before investing time in repair or printing.
How does MeshRefinery work?
- Drop your STL, OBJ, or GLB file onto the page — it's parsed instantly in your browser via WebAssembly.
- Check the diagnosis report, which lists open edges, floating shells, degenerate faces, and other issues.
- Click one button to repair (free or deep) or convert, then download the result directly to your device. No account is required for basic operations.
Pricing
MeshRefinery operates on a freemium model. Diagnosis and basic repair (watertight but color-stripped) are free. Deep repair costs 20 credits per model, and image-to-3D generation costs 30 credits. Paid plans include:
- Starter — $9.90/month (or $7.92/month billed annually at $95.04), includes 1,800 credits per year (150/month).
- Pro — $19.90/month ($15.92 annual equivalent), 4,800 credits per year (400/month).
- Studio — $49.90/month ($39.92 annual equivalent), 18,000 credits per year (1,500/month).
All paid plans include deep repair, image-to-3D, commercial use of generated models, and email support (priority for Pro and Studio).
