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Free Online to Converter – Fast, Secure & Cloud-Based

Easily convert your . files to . format using our powerful online 3D CAD converter—no downloads or installations required.

Drag & drop your 3D files here to convert

Supported formats:

upload
Organization FeaturesFile stay private
Organization FeaturesAutomatically deleted after 24hrs
Organization Featuresadd upto 300MB

IGES

Initial Graphics Exchange Specification is an early and widely used file format standard for the exchange of 2D and 3D CAD (Computer-Aided Design) data between different software applications. It was developed by the U.S. National Institute of Standards and Technology (NIST) in the 1980s to allow interoperability between different CAD systems.

STEP

Standard for the Exchange of Product model data is an ISO standard (ISO 10303) used for representing product data in a neutral and portable format for computer-aided design (CAD) and manufacturing applications. It enables the exchange of 3D CAD models, assemblies, and related product data between different software systems.

Why Choose Marathon OS 3D CAD File Converter?

Marathon OS lets you convert 3D CAD files between formats effortlessly with a powerful, cloud-native engine—fast, secure, and optimized for professionals.

Organization Features
Lightning-Fast Conversion

Convert your 3D CAD files in seconds, no matter the size or complexity. Marathon OS uses a high-performance backend to deliver rapid results.

Organization Features
No Software Installation

Forget bulky desktop tools—just upload your file and convert directly from your browser.

Organization Features
Engineered for Professionals

Built for engineers, designers, and manufacturers who need reliable, high-quality conversions to suit their workflows.

Organization Features
Supports Multiple Formats

Convert between STEP, IGES, STL, OBJ, PLY, OFF, and BREP formats—all from a single, unified interface.

Organization Features
Cloud-Based & Private

All files are securely processed in the cloud and automatically deleted after 24 hours to ensure your data stays safe.

Essential Features of Marathon OS 3D CAD File Converter

Effortlessly convert 3D CAD files with a fast, secure, and scalable cloud tool. Experience seamless format conversion—no software installation required.

Seamless CAD File Conversion

Convert STEP, IGES, STL, BREP, OBJ, PLY, OFF, and more—instantly and without setup delays.

Handles Large & Complex Models

Optimized to convert even intricate engineering models with accuracy and speed—no matter the size or complexity.

No Installation Required

Convert 3D files directly from your browser. No downloads, no plugins—just drag, drop, and go.

Secure & Privacy-Focused

Your files are encrypted during upload, processed securely, and automatically deleted after 24 hours to protect your data.

CAD Converter Types

FAQ

Find answers to common questions about Marathon OS 3D CAD File Converter. Whether you're getting started or looking for advanced features, we've got you covered.

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What is Marathon OS 3D CAD File Converter?
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What file formats are supported?
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Is Marathon OS 3D File Converter free to use?
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How is my data stored and secured?
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Do I need any special software or training?
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Can I convert large and complex CAD models?