Drawing-Files

Someone emailed you a .slddrw file. Or you found one on a shared drive and need to know what it contains. This post answers the practical questions: what .slddrw actually is, how it differs from SolidWorks’ other file types, how to open it without a SolidWorks license, and what data you can and can’t extract from it. What is a .slddrw File? .slddrw is the file extension for SolidWorks Drawing files. These are 2D technical drawings — the dimensioned, annotated sheets that engineers produce from 3D SolidWorks models to communicate manufacturing requirements. ...

Every SolidWorks user has opened a .SLDDRW file thousands of times. You place views, add dimensions, print to PDF, send it to the shop. But what’s actually inside that file? Is it vector graphics — maybe SVG behind the scenes? Is it a database of coordinates? How does a drawing “know” what the 3D model looks like from the front? We decompiled the SolidWorks interop DLLs, inspected exported symbols from native C++ libraries, and dug through the API documentation to answer these questions. Here’s what we found. ...