Free online 3D model repair — STL · OBJ · GLB
Your model looks perfect.
Your slicer will reject it.
AI generators and 3D scans ship meshes full of invisible holes and debris. We diagnose them free in your browser — and rebuild them watertight in one click.
✗ Every model below came from a top AI generator — every one failed its first slicer check. ✓ We repaired them all.
Drop a broken model — repair report in seconds
.stl .obj .glb .gltf — free, no signup, parsed in your browser
Five models. Five slicer failures. Five repairs.
We generated these with our own Image to 3D tool. Rotate them — they look flawless. The numbers under each one are what the slicer sees.
Treasure Chest
40,836 open edges → 0 · watertight ✓
Baby Dragon
48,222 open edges → 0 · watertight ✓
Potion Bottle
28,731 open edges → 0 · watertight ✓
Watchtower
54,928 open edges → 0 · watertight ✓
Crystal Cluster
46,230 open edges → 0 · watertight ✓
Two repairs. One is free.
Free repair rebuilds the geometry — watertight, but colors are dropped. Deep repair rebuilds the surface and keeps every color, like the treasure chest above. Both run on your real file, and you see the diagnosis before paying anything.
Free STL Repair
Fix non-manifold edges, holes and floating fragments — get a watertight file your slicer will accept.
Format Conversion
Convert between STL, OBJ and GLB. Every converter runs locally — nothing is ever uploaded.
Private by Design
Parsing and repair run as WebAssembly in your browser tab. Your model never touches a server.
Works with Any Generator
Meshy, Tripo, Hunyuan, a photogrammetry scan — doesn't matter where your model came from. If it has holes, debris or non-manifold edges, we fix it.
Why MeshRefinery
Diagnosis is always free, and it never hides what it finds.
How it works
Three steps, no account required.
1Drop your file
STL, OBJ or GLB — parsed instantly in your browser. Nothing is uploaded.
2Check the report
See exactly what's wrong (or confirm it's already clean) before you do anything else.
3Fix, convert, download
One click to repair or convert, then download the result straight to your device.
Everything you need to get a working file
One toolbox for fixing and converting 3D models.
Watertight repair
Fill small holes and remove floating debris so your slicer accepts the file.
GLB, STL & OBJ conversion
Convert between the three formats that matter most for printing, games and the web.
Live 3D preview
Rotate and inspect your model before and after every operation.
Instant diagnosis
Open edges, non-manifold geometry, floating shells and degenerate faces — flagged in under a second.
No account needed
Every core tool works free, with no signup, for single files.
Local-first processing
WebAssembly in your browser tab — no server round-trip, no file retention.
Simple pricing, free to start
Diagnosis is always free. Credits only when you need deep repair or AI generation.
Starter
Includes
- 1,800 credits per year (150/mo)
- Save 20% vs monthly
- Deep repair & image-to-3D included
- Commercial use of generated models
- Email support
Pro
Includes
- 4,800 credits per year (400/mo)
- Save 20% vs monthly
- Deep repair & image-to-3D included
- Commercial use of generated models
- Priority email support
Studio
Includes
- 18,000 credits per year (1500/mo)
- Save 20% vs monthly
- Best subscription rate per credit
- Commercial use of generated models
- Priority email support
Frequently Asked Questions
Have another question? Contact us by email.
Fix the file you have. Or generate the one you need.
Diagnosis is free and takes seconds — deep repair 20 credits, image to 3D 30 credits. Either way, you leave with a file that prints.