How to Post on Instagram from a Computer
If you edit Instagram pictures on your computer with programs like photoshop, you probably then AirDrop the images to your phone so you can post from the app, but it’s possible to upload to Instagram directly from your computer. By changing developer options, and using “Toggle Device Toolbar,” you can make your web browser replicate that of a smartphone! Here’s how to post on Instagram from your computer.
Credit : Tech Insider