Does HTML 5 support PDF? If not try this :
Use inkscape and you can render the PDF to a PNG raster file.
If you need to do it in real time, you can use Image magic on your server:
The command you have to pass to CLI is something like :
convert -density 300 *.pdf -resize 25% *.png
-density 300 is the DPI
-resize 25% will make so it is not HUGE
Use the * for the entire folder, or you can use specific file names to just do one at a time.