Instant Processing
Most repairs complete in under 60 seconds. Complex meshes with millions of polygons finish in 2-3 minutes.
Why Choose Remeshy STL Repair?
Professional-grade mesh repair powered by advanced algorithms, completely free in your browser.
Non-Manifold Repair
Automatically detects and fixes non-manifold edges, vertices, and faces that cause 3D printing failures.
Multiple Formats
Supports STL, OBJ, FBX, GLB, GLTF, and PLY input. Download repaired files as STL or OBJ.
How to Repair Your STL File
Three simple steps to fix your 3D model and prepare it for printing.
1
Upload Your File
Drag and drop your STL, OBJ, or other 3D file. We support files up to 100MB.
2
Automatic Repair
Our algorithm analyzes your mesh and automatically fixes all detected issues.
3
Download & Print
Download your repaired, watertight mesh ready for slicing and 3D printing.
STL Repair Tool Comparison
See how Remeshy compares to other popular mesh repair solutions.
| Tool | Price | Online | Non-Manifold Fix | Hole Filling | Batch API | Speed |
|---|---|---|---|---|---|---|
| ⭐ Remeshy | Free* | Fast | ||||
| Meshmixer | Free | Medium | ||||
| Netfabb | $$$ | Fast | ||||
| 3D Builder | Free | Slow | ||||
| Blender | Free | Varies | ||||
| MakePrintable | $$ | Medium |
* Free tier available with generous daily limits. API access for high-volume users.
Common STL Problems We Fix
Remeshy automatically detects and repairs these common mesh issues.
Non-Manifold Edges
Edges shared by more than two faces, causing slicers to fail or produce unpredictable results.
Auto-repaired by RemeshyHoles in Mesh
Missing faces that make the model non-watertight, preventing proper slicing.
Auto-repaired by RemeshyInverted Normals
Faces pointing inward instead of outward, confusing slicers about inside vs outside.
Auto-repaired by RemeshySelf-Intersections
Overlapping geometry that creates invalid solid regions.
Auto-repaired by RemeshyDegenerate Faces
Zero-area triangles and collapsed geometry that cause processing errors.
Auto-repaired by RemeshyDisconnected Components
Floating geometry and internal debris that add print time and waste material.
Auto-repaired by RemeshyFrequently Asked Questions
Everything you need to know about STL repair and mesh fixing.
A non-manifold mesh has geometry that cannot exist in the real world. This includes edges shared by more than two faces, internal faces floating inside the model, or vertices that connect separate mesh parts without proper topology. These issues prevent 3D printers from understanding the model's solid volume, causing print failures.
STL files commonly have issues from 3D modeling, file conversions, or boolean operations. Problems like holes, non-manifold edges, and inverted normals prevent slicing software from calculating proper toolpaths. Without repair, you'll experience failed prints, missing sections, or printer errors.
Yes! Remeshy offers free STL repairs with a generous daily limit. Simply create a free account to get started. For high-volume users or API integration, we offer affordable credit-based plans. No credit card required for the free tier.
Remeshy accepts STL, OBJ, FBX, GLB, GLTF, and PLY file formats. After repair, you can download your fixed model in both STL and OBJ formats for maximum compatibility with slicers and other 3D software.
Most repairs complete in under 60 seconds. Complex meshes with millions of polygons may take 2-3 minutes. All processing happens on our servers, so your computer's speed doesn't affect repair time.
Remeshy's repair algorithm is designed to preserve your model's geometry as much as possible. We typically retain 80-95% of the original geometry while fixing all manifold issues. The repair report shows exactly what percentage was retained.
Yes! Remeshy offers a powerful REST API for integrating STL repair into your applications or workflows. Process thousands of files automatically with webhooks for completion notifications. View API documentation.
Ready to Fix Your STL Files?
Join thousands of makers and professionals using Remeshy for reliable 3D printing.
Start Repairing — It's Free