How to open multiple local HTML files in Google Chrome at once?

You can achieve this by adding Chrome to "Send to" and then "sending" your desktop files/images there.

I'm not sure if this is the best solution, but it worked for me. This was previously answered here.

You can just create a new text file and change the file extension to .bat then type something like this:

start chrome.exe http://www.google.com
start chrome.exe file-path-here    
start chrome.exe another-file-here

Then all you have to do is double click that file and they'll all open up in different tabs.

You can drag and drop multiple HTML files on a shortcut to Chrome (on the Desktop for instance) to open all those files in new tabs in the browser. Alternatively, you can open the Chrome installation folder (possibly C:\Program Files (x86)\Google\Chrome\Application) in another Windows Explorer and drop your file directly on the chrome.exe executable.

Note that this does not work on icon of pinned software in the Taskbar on Windows 8+ (but it will probably work on a shortcut in a custom toolbar).