Command line solution
This is easy to do with newer releases of Chrome:
google-chrome --headless --dump-dom 'http://www.yahoo.com'
(The OP may not have been looking for a command line solution but this search result appears high when searching so others might find it useful)
Original answer 2017
My favorite way to do this is:
docker run -it --rm --name chrome --shm-size=1024m --cap-add=SYS_ADMIN --entrypoint=/usr/bin/google-chrome-unstable yukinying/chrome-headless-browser --headless --disable-gpu --dump-dom https://www.facebook.com
If you're not familiar with how Docker works, be patient - the first time will be slow but subsequent invocations will be quick.
Other information
Tested on
Ubuntu 16
Linux intel-nuc 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Docker version:
Docker version 1.10.3, build 20f81dd
Mac OS X Sierra
Darwin MacBook-Pro.local 16.7.0 Darwin Kernel Version 16.7.0: Thu Jun 15 17:36:27 PDT 2017; root:xnu-3789.70.16~2/RELEASE_X86_64 x86_64 i386 MacBookPro14,3 Darwin
Docker version:
Docker version 17.06.1-ce, build 874a737
If you install tidy
you can indent the HTML too.