dxf-viewer

dxf-viewer is a high-performance 2D DXF viewer for JavaScript/TypeScript, leveraging WebGL via three.js for rendering large CAD files. Current stable version is 1.0.47. It uses geometry batching and instanced rendering to minimize draw calls, and supports lazy-loading of multiple TTF fonts for text. Key differentiators include web-worker support for offloading heavy processing and efficient handling of block instances. It has limited support for features like MTEXT formatting, line patterns, and hatches, and is primarily maintained by a single developer with periodic updates. No stream parser yet, so large files (>1GB) may hit JS engine string limits.