Vector graphics in a PDF may be displayed directly in a webpage by using SVG. Convert PDF to SVG by
inkscape in.pdf --export-plain-svg=out.svg
You can view
out.svg in any web browser, and zoom in virtually unlimited as it’s vector graphics like your original PDF diagram.
Draftsight SVG output
DraftSight 2-D CAD actually outputs PDF even when EPS is selected. Convert PDF to SVG vector graphics for high resolution diagram on a webpage without download.