In Mac Chrome, I like to switch the default, global Page Zoom settings from 100% to 125%. I'd like a shortcut to do it quickly instead of needing to go to Settings, click Show Advanced Settings, and finally changing the Web Content Page Zoom.

I wonder if there's a way to create an Automator shortcut / hot key? I'm new to Mac so unsure of these tricks.

To be clear, I already know about changing zoom settings Per Website by clicking Command +/-

  • In OS X, this setting is saved in ~/Library/Application Support/Google/Chrome/Default/Preferences, a JSON file that you can edit directly. It's the default_zoom_level key. Just need to find a proper way to toggle this externally. – slhck Jan 28 '13 at 20:50
  • I have no idea how to "toggle this externally". Anyone know how to do this? – Joe Fletcher Jan 30 '13 at 20:22
  • You could write a shell script to toggle the value of that key in the JSON file, wrap it in an Automator action, and assign a shortcut to that. – Nathan G. Jan 31 '13 at 1:10
  • How would I do that in a shell script? Do you have a search and replace method that would find that particular value and change it? – Joe Fletcher Jan 31 '13 at 4:57

I have to post this as an answer rather than a comment (as I don't have enough rep), but you can use sed and/or awk to find the particular line of text you're looking for and replace the default value with whatever value is needed to zoom to your liking. I looked at my Preferences JSON file, but I didn't seem to have the default_zoom_level key, so I can't tell you exactly how to do it, but I did some tests on a sample file using a variation of this script:


where ORIGINALVALUE is the value is the default 100% zoom and NEWVALUE is whatever you need to enter to zoom to 125%. As I mentioned above, I didn't see the default_zoom_level key in the file I have, so I cannot verify that this will work in this specific file.

The sed command used here should be able to and replace whatever text you want, but I suspect you will need to use awk as well to find the specific line you're looking for, since there seems to be a lot of lines containing default_ in the file.

There is probably a much more elegant way to do this, but I hope my answer helps!

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