Some block scraping software blocks Convert's Visual Editor. This is because the block scraping software confuses Convert's Visual Editor with scraping software agents.
If you run into this issue, to make Convert's Visual Editor work on your site, you may need to add the Convert's Visual Editor "User Agents" to the whitelist of your block scraping technology.
Here are the "User Agents" used by Convert's Visual Editor:
default View UA:
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8) Gecko/20051111 Firefox/1.5 BAVM/1.0.0 Convert.com(http://www.convert.com)
Android Phone View UA:
Mozilla/5.0 (Linux; U; Android 2.3.6; en-us; Nexus S Build/GRK39F) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1 Convert.com(http://www.convert.com)
Android tablet View UA:
Mozilla/5.0 (Linux; U; Android 2.2; en-us; SCH-I800 Build/FROYO) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1 Convert.com(http://www.convert.com)
Ipad View UA:
Mozilla/5.0 (iPad; CPU OS 4_3_2 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8H7 Safari/6533.18.5 Convert.com(http://www.convert.com)
Iphone View UA:
Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_2 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8H7 Safari/6533.18.5 Convert.com(http://www.convert.com)
Also to identify when Convert's Visual Editor is accesing your site you can find the following string in the end of Convert's UAs: Convert.com(http://www.convert.com) . This will allow to match your UA's against that.
Also, when we load the website through our proxy, we send the following header: value pair: Fetched-by: Convert.com.