CAD DXF Viewer is an in-browser utility for opening and inspecting 2D architectural blueprints, mechanical outlines, and floorplans saved in the ASCII Drawing Exchange Format (.dxf) without installing proprietary CAD software.

### File Parsing and Viewport Controls - **Entity Extraction:** Reads ASCII DXF LINE records, parsing start coordinates (group codes 10 and 20) and end coordinates (group codes 11 and 21) across the file. - **Automatic Bounding Box Scaling:** Computes minimum and maximum geometric extents to scale and center vector line segments within the 800 × 500 pixel canvas. - **Display Themes:** Switch between three viewing styles: - *Blueprint:* Dark navy background (#0B2545) with bright cyan vectors (#64DFDF). - *Dark:* Charcoal canvas (#111827) with light blue vector lines (#38BDF8). - *White:* High-contrast white background (#FFFFFF) with dark slate linework (#0F172A). - **Fallback Demonstration:** If an uploaded file contains unsupported 3D entities or lacks raw LINE commands, the viewer displays a sample 2D floorplan layout. - **Export Capabilities:** Download the rendered canvas directly as a PNG image file.

### Local Processing and Privacy Note File parsing executes entirely on your device using the browser FileReader and HTML5 2D canvas APIs. Your architectural drawings, engineering schematics, and floorplans are never uploaded or transmitted to any server.