CutyCapt
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Found here: http://xmodulo.com/2014/02/convert-html-web-page-png-image-linux.html
Homepage: http://cutycapt.sourceforge.net/
Install on Debian, Ubuntu or Linux Mint:
$ sudo apt-get install cutycapt
Convert HTML to PNG with CutyCapt
$ cutycapt --url=http://www.bigjigstoys.com --out=/home/user/Pictures/cnn.png