MeshRefinery

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?

1. Drop your STL, OBJ, or GLB file onto the page — it's parsed instantly in your browser via WebAssembly.
2. Check the diagnosis report, which lists open edges, floating shells, degenerate faces, and other issues.
3. 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).