Everyone else may know this, but it’s saved me a bunch of time so I thought I’d share:
Ever wanted to post a pic on Instagram created on your PC? Easy. Open Chrome browser, go to Instagram.com and log in, Press Ctrl+Shift+i to bring up devtools, then Ctrl+Shift+m to toggle between desktop and virtual smart phone mode. Once you’re in smart phone mode press [F5] to refresh the page. You’ll see the “+” on the bottom of the virtual phone screen. Upload an image from your PC’s hard drive.