Bdtyktl

The Duplicate Tab Shortcut Key extension allows native duplicate tab functionality with a customizable shortcut key.

Using the extension allows you to duplicate a tab with the browser's built in functionality so the history is preserved and the page isn't reloaded.

The tab key is customizable using Chrome's API - the extension doesn't just monitor each tab's DOM for the shortcut key event as some of the other extensions do.

The extension comes with fairly thorough documentation.

You can just press Alt+D then Alt+Enter. You don't even need to let go of the Alt key.

I wrote a simple script for autohotkey if anyone is interested. Just paste this into notepad and save as "scriptname.ahk" then double click it (make sure you have autohotkey installed)

!t is alt+t, change it to whatever shortcut you need

!t::

Send {Esc}

MouseGetPos, X, Y

MouseClick, M, 75, 45,,0

MouseMove, X, Y, 0

return

edit: sorry put this little line before it to only have this work in chrome so it doesn't mess up your other shortcuts

#IfWinActive, ahk_class Chrome_WidgetWin_0

!t::

Send {Esc}

MouseGetPos, X, Y

MouseClick, M, 75, 45,,0

MouseMove, X, Y, 0

return

It can be done as follows:

CTRL + L (Takes the cursor to the address bar)

ALT + ENTER (Opens a new tab with this url)

This looks as a good work around to me..

I referred: http://lifehacker.com/5387881/duplicate-a-google-chrome-tab-with-a-shortcut-key
for this solution.

Hope it helps!!!

Yes and no. It's not a definite "Duplicated Tab". It's a two step process.

For Mac OS

Press Command+L to set the focus on the address bar and then press either:

Option+Return to duplicate the tab into a new tab, or

Shift+Return to duplicate the tab into a new window.

For Windows

Press Ctrl+L to set the focus on the address bar and then press Alt+Enter to duplicate the tab into a new tab.

Maybe you can use the Smoothe Mouse Gestures add on to create a shortcut with a mouse gesture.

I read this question yesterday, and have just found a possible solution, that doesn't require a plugin, though it is not a keyboard shortcut as your question asked!

If you middle click (push the scroll wheel down) on the back button this opens a new tab with the same history, admittedly you are one step back in your history, but it is a duplicate.

The address bar select + enter trick on OS X (not a "true duplicate", but close enough for me):

command+L command+enter

Thanks to https://superuser.com/a/310162/127024.

My favorite shortcut for duplicating a tab is as follows: alt+D+enter¹.

Some other commands/series of commands are as follows:

• 
  ctrl+L² → alt+D
  


• 
  f6 → alt+enter
  

As you may notice, these commands all put the focus on the omnibox whereupon you use alt+enter to "duplicate" the tab. Unfortunately, however, all of the said commands make use of alt+enter, which is not a true tab duplication command, but rather one which opens the same website in a separate tab (usually does not store current data such as your scroll-position and text typed into text-boxes).

¹ If you are the technical type, however, you may want to know that this is actually a mashup of alt+D and alt+enter

²ctrl+L might be interpreted by the computer as a command to insert a link (in a text box).

On MacOS, you can do Cmd + L then Enter. It opens a duplicate tab at the end of tabs.

To open one right next to current one, I haven't found a shortcut key for it. Using mouse, you can do Cmd + click the Refresh button as mentioned above.

I just click the Location/Address to select the whole thing, Ctrl-C to copy it, Ctrl-T to open a new tab, click in the new Location/Address, Ctrl-V to paste, and Enter to load a copy.

You may try F6 and press Alt+Enter.