RAW to Jpeg quality looks fine in Aperture not so good on Web page
I am using the latest version of Aperture with the Retina display. The Raw images look tremendous, after I resize the image and save it to jpeg the image still looks good. When I upload to a web page the image looks horrible. There is a lot of noise and the image over all looks blurred. I open it in Aperture and it looks fine. What is the issue? I have tried the different settings when saving the image and nothing works. I have also saved the image in a tif format and still the same issue. Looks great in aperture not so great on the web. Please help if possible.
Aperture 3, OS X Mountain Lion (10.8.2)