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View 3D STEP and STP CAD files directly in your browser. Powered by OpenCascade and Three.js. # Chrome Web Store Description: STEP Viewer **Short Description:** Instantly view, inspect, and analyze 3D STEP & STP CAD files directly in your browser. 100% offline, private, and powered by OpenCascade. --- **Detailed Description:** Welcome to the ultimate **STEP File Viewer** for Google Chrome! Whether you are a mechanical engineer, a product designer, a 3D printing enthusiast, or a manufacturing professional, opening complex 3D CAD models shouldn't require downloading massive, expensive desktop software or uploading your highly confidential designs to sketchy cloud servers. Our STEP File Viewer is a professional-grade, high-performance 3D CAD viewer built entirely as a native Chrome Extension. It leverages cutting-edge WebAssembly (WASM) technology to bring industrial-grade CAD parsing directly to your browser tab. ### 🚀 Key Features 🔒 **100% Privacy & Local Processing** Your intellectual property is incredibly valuable. Unlike other web-based CAD viewers that secretly upload your designs to remote servers for processing, this extension processes **everything locally** on your own computer. Your files never leave your machine. There are no servers, no databases, and absolutely no tracking. ⚡ **Industrial-Grade Precision (OpenCascade)** Under the hood, we utilize a WebAssembly port of the legendary **OpenCascade Technology (OCCT)** engine. This is the exact same mathematical geometry kernel used by multi-thousand-dollar desktop CAD suites. This ensures that every curve, surface, and exact B-Rep geometry is parsed and tessellated with flawless, millimeter-level precision. 🎮 **Silky Smooth 3D Rendering (Three.js)** Once parsed, your models are rendered using the industry-leading **Three.js** WebGL engine. We have custom-tuned our lighting engine with a calibrated hemisphere and multi-directional lighting setup to accurately highlight fillets, chamfers, and surface geometries without blowing out highlights or hiding details in shadows. 📊 **Instant Metadata & Diagnostics** As soon as you drop a file into the viewer, the extension instantly calculates and displays critical metadata: - **Total Mesh Triangles & Vertices:** Perfect for optimizing models for 3D printing or game engines. - **Bounding Box Dimensions:** Instantly see the exact physical footprint of your model (X, Y, Z coordinates). - **Sub-assembly Parts Count:** See exactly how many individual solid bodies make up your assembly. ✈️ **Fully Offline Capable** Working on a flight, at a remote manufacturing plant, or in a high-security air-gapped facility? No problem. Because this extension contains the entire OpenCascade engine inside a highly optimized Chrome Sandbox, it requires absolutely **zero internet connection** to function. ### 🛠️ How It Works 1. **Click the Extension Icon:** The viewer instantly opens in a clean, distraction-free tab. 2. **Drag & Drop:** Simply drag any `.step` or `.stp` file anywhere onto the screen, or click "Browse Files". 3. **Instantly View:** The WebAssembly engine parses the mathematical geometry in seconds, generating a lightweight tessellated mesh for you to interact with. 4. **Inspect:** Use your mouse to intuitively orbit, pan, and zoom around your model. ### ⚙️ Technical Specifications - **Supported Formats:** STEP, STP (AP203, AP214, AP242) - **Geometry Kernel:** OpenCascade (WASM compiled) - **Graphics Engine:** WebGL via Three.js - **Deflection Tolerance:** 0.001 (High-resolution tessellation for extreme detail) - **Architecture:** Chrome Manifest V3 with secure Sandboxed Web Workers for maximum stability and speed. ### 🛡️ Strict Privacy Policy We believe in radical transparency. - **No Data Collection:** We do not collect, store, or transmit your 3D files. - **No Telemetry:** We do not track your usage, clicks, or viewing habits. - **No Accounts Required:** You don't need to sign up, log in, or provide an email address. Your CAD models are your business. Our business is simply giving you the fastest, most secure tool to view them. *Powered by OpenCascade & Three.js* *Published by Akriti Precision Systems*