I Built a Free Browser-Based online DWG file & DXF file Viewer — No Install, No Signup

If you've ever worked with CAD files, you know the pain. Someone sends you a .dwg or .dxf file and you either need expensive software to open it or some clunky desktop viewer that takes forever to install. I ran into this problem constantly — so I decided to build something that solves it. What I Built BlinkCAD — a free online DWG and DXF viewer that runs entirely in the browser. No downloads, no signups, just drag and drop your file and it opens. I built it using Next.js, Three.js for WebGL rendering, and Node.js on the backend. The goal was simple — make it as easy as possible to open a DWG file without installing anything. Features Opens DWG and DXF files instantly in the browser Measurement tools — distances, angles, and areas directly on drawings Layer toggle — show/hide individual layers Share with a link — one-click shareable links with optional password protection Annotation tools — line, rectangle, circle, pen No signup required — zero friction, completely free Who Is It For?