Professional 3D Conversion

Convert 3D Files in Seconds

The #1 professional 3D file converter with automatic repair, optimization, and 3MF support. Trusted by 50,000+ users.

STL • OBJ • PLYGLTF • GLB3MF • STEPAuto Repair

Why Choose ConvertMesh?

Join thousands of 3D professionals who trust ConvertMesh for their file conversion needs

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Lightning Fast

Convert files in seconds, not minutes. Our optimized engine handles complex meshes with ease.

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100% Private

Your files never leave your browser for basic conversions. Pro files are deleted immediately after processing.

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Format Expert

Support for STL, OBJ, PLY, GLTF, GLB, 3MF, STEP and more. Perfect conversion every time.

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Batch Processing

Convert multiple files at once. Upload a ZIP or select multiple files - we handle the rest.

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Pro Features

Need more? Pro plan offers 100MB files, unlimited conversions, and priority processing.

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No Installation

Works on any device with a browser. No downloads, no plugins, no hassle.

50K+

Files Converted

99.9%

Success Rate

< 5s

Avg. Conversion Time

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."

API Key (optional - leave empty for free plan)

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Convert to format

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

3D Printing:

Convert models to STL or 3MF for your 3D printer. 3MF supports multi-color and multi-material printing.

Game Development:

Optimize assets with OBJ to GLTF conversion for web games and mobile apps.

CAD Workflows:

Convert between STEP, STL, and OBJ for engineering and manufacturing documentation.

How it works:

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: