HttpFlow is Professional HTTP sniffer, you can use it to track http or https requests in the webpage, view the resource code of html/css/js, save images in the webpage even the background image.

Features:

# split view to work with webpage and logs
# full screen view to view the logs
# view the source code of plain text data
# get every image loaded in the webpage
# share codes or image by airdrop and SNS
# filters to log less url and track the url you care
# easy to dismiss window by drag down
# copy or open url in source code
# source code search
# custom User-Agent
# Open in HttpFlow in Safari extension