✨Limited-Time Free Preview:Try our new AI-powered Model Repair & Optimization features on any plan!
Professional 3D Model Processing
Instantly repair, optimize, and convert your 3D models for any workflow.
Single File Conversion
Multiple Files (ZIP Output)
ZIP Batch Processing
Beyond Conversion: Intelligent 3D Model Processing
Your 3D models are now ready for any application. Fix broken geometry, optimize for performance, and convert—all in one step.
Automatic Mesh Repair
Automatically fills holes, fixes flipped normals, and removes non-manifold edges to create watertight, printable models.
Performance Optimization
Drastically reduce polygon counts with intelligent mesh simplification, perfect for game engines and AR/VR.
Why ConvertMesh vs. Generic Converters?
3D-Specialized Focus
Unlike generic file converters, we focus exclusively on 3D formats with deep expertise in mesh integrity and quality preservation.
Automated Repair & Optimization
Go beyond conversion. Automatically fix broken meshes and optimize polygon counts, saving you hours of manual work.
Advanced Batch Processing
Process up to 50 files simultaneously with progress tracking—something most competitors don't offer or charge premium for.
Developer-First API
Clean, documented REST API with competitive pricing—perfect for integrating into your development workflow or applications.
Quality & Performance
Fast processing with mesh integrity preservation. No quality degradation, ads-free experience for Pro users.
Start converting smarter, not harder. Join developers and 3D professionals who trust ConvertMesh.
Professional 3D File Converter for All Your Needs
ConvertMesh is the leading free online 3D file converter and model processing tool with native 3MF manufacturing format support designed for 3D printing enthusiasts, game developers, and CAD professionals. Convert between formats including 3MF to STL, STL to 3MF, STL to OBJ, GLTF to STL, PLY converter, and GLB file conversion, and now featuring automatic 3D model repair and mesh optimization.
Why Choose ConvertMesh?
- Native 3MF Support: Full support for Microsoft's 3D Manufacturing Format - most competitors don't offer this!
- No Software Installation: Convert 3D files directly in your browser
- Free & Pro Plans: Start free, upgrade for larger files and advanced features
- Batch Processing: Convert multiple 3D files simultaneously
- Secure & Private: Your 3D models are processed securely and not stored
- Manufacturing Ready: Professional 3MF conversion for additive manufacturing and 3D printing
- Game Development: Optimize 3D assets for Unity, Unreal Engine, and other platforms
Supported 3D File Formats
Input Formats: |Output Formats:
Need help choosing the right format? Check our complete file format guide or read our step-by-step tutorials for common conversion scenarios.
Common Conversion Use Cases
Convert models to STL or 3MF for your 3D printer. 3MF supports multi-color and multi-material printing.
Optimize assets with OBJ to GLTF conversion for web games and mobile apps.
Convert between STEP, STL, and OBJ for engineering and manufacturing documentation.
- Free Plan: Basic file size limits and conversion quotas
- Pro Plan: Higher limits, priority processing, and advanced features
- Batch Processing: Failed conversions are saved as .error.txt files
- Supported Formats:
