✨Limited-Time Free Preview:Try our new AI-powered Model Repair & Optimization features on any plan!
Convert 3D Files in Seconds
The #1 professional 3D file converter with automatic repair, optimization, and 3MF support. Trusted by 50,000+ users.
Why Choose ConvertMesh?
Join thousands of 3D professionals who trust ConvertMesh for their file conversion needs
Lightning Fast
Convert files in seconds, not minutes. Our optimized engine handles complex meshes with ease.
100% Private
Your files never leave your browser for basic conversions. Pro files are deleted immediately after processing.
Format Expert
Support for STL, OBJ, PLY, GLTF, GLB, 3MF, STEP and more. Perfect conversion every time.
Batch Processing
Convert multiple files at once. Upload a ZIP or select multiple files - we handle the rest.
Pro Features
Need more? Pro plan offers 100MB files, unlimited conversions, and priority processing.
No Installation
Works on any device with a browser. No downloads, no plugins, no hassle.
Trusted by 3D Professionals
Alex Johnson
3D Artist
"ConvertMesh saved me hours! I converted 50+ STL files to OBJ in minutes. The batch processing is a game-changer."
Sarah Chen
Product Designer
"Finally a converter that handles 3MF files properly! Perfect for our manufacturing workflow."
Mike Torres
3D Printing Enthusiast
"Free, fast, and it actually works! No more broken meshes or corrupted files."
Single File Conversion
Multiple Files (ZIP Output)
ZIP Batch Processing
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:
