Category · 10 tools
Free CAD & 3D Model Converters
Convert between CAD and 3D model formats instantly in your browser. No software installation, no file uploads to servers, and no account needed.
All cad & 3d (10)
What You Can Do
These tools handle the most common professional and hobbyist 3D formats: STEP (industry standard for mechanical CAD), STL (standard for 3D printing and manufacturing), OBJ (universal for 3D graphics), IGES (legacy CAD format), PLY (point cloud and mesh data), 3MF (modern 3D printing format), and glTF (web and real-time 3D rendering). Whether you're preparing models for 3D printing, converting between CAD systems, optimizing for web display, or bridging incompatible software, these converters eliminate the need for expensive commercial CAD software or complex command-line tools.
Each conversion runs entirely in your browser. Your 3D model never leaves your computer, making this ideal for proprietary designs, confidential projects, or simply keeping your data private. The tools handle batch operations and preserve model geometry and metadata where applicable.
How These Converters Work
Upload your 3D file, select your target format, and download the result in seconds. The conversion happens client-side using WebGL and JavaScript 3D libraries—no server processing, no waiting for network uploads, no privacy concerns. This approach also means zero latency: even large models convert instantly on modern browsers.
Format choice depends on your use case. STEP and IGES preserve CAD history and parametric data for engineering workflows. STL is the de facto standard for 3D printing and CNC machining. OBJ works with virtually every 3D editor, game engine, and renderer. PLY stores point cloud and color data. 3MF is the modern printing standard with better compression. glTF is optimized for web and real-time visualization on tablets and phones.
When to Use Format Conversion
Convert STEP to STL when sending CAD models to a 3D printer or machine shop. Convert OBJ to glTF if you're embedding 3D models on a website. Use IGES conversion when working with legacy systems that don't support modern formats. Converting between mesh formats (STL, OBJ, PLY) is useful when switching between design software, graphics tools, or web platforms—each format has different compression and feature support, and sometimes a simple conversion is faster than re-exporting from your primary tool.
Frequently asked questions
Are these converters really free and private?
Yes. All conversions run in your browser without uploading to any server. Your files remain on your computer. No account, payment, or data collection required. The tools are completely free and will always be.
Which format should I use for 3D printing?
STL is the universal standard for 3D printers and print services. 3MF is newer and compresses better, but older printers may not support it. If your CAD model is in STEP or IGES, convert to STL before sending to a print shop or slicing software.
Can I convert models with color or texture information?
Some formats preserve color (PLY, OBJ with accompanying MTL files, glTF) while others do not (STEP, IGES, STL store geometry only). If color or texture is critical, check your source and target formats—the converter will preserve what the formats support.
What size files can these tools handle?
Browser limits vary by device, but modern browsers handle models up to several hundred megabytes. Performance depends on your RAM and GPU. Very large point clouds or CAD assemblies may be slower, but conversion still happens locally without server constraints.