Sometimes you just want to transform the page's contents into a data URL - this userscript will do it.
Works for all HTML pages and most other data types:
Click on Tampermonkey's icon and select "get data URL" when viewing the page/media you wish to URLise.
Yes, Chrome's dev tools do allow you to get a data URL of an image, but they don't work for other media, e.g. sound; plus, sometimes it's more convenient to use the monkey icon ;)