Is there anyway to make the Safari window smaller by width on Mac? It will only let you make it about 500px in width before it stops. Basically I'm trying to test out some mobile web designs so I would like to have a smaller window in Safari.


You can enter Responsive Design Mode to set a custom size and resolution of the viewport.

  1. Enable the Develop menu from Preferences → Advanced → Show Develop menu in Menu bar
  2. Choose Develop → Enter Responsive Design Mode.
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