So I'm not sure if this is a known method or not, sorry if it is. I searched around BHW for it but couldnt find it. So this won't work for everyone. Not sure why, some accounts this works on, on others it doesn't. You can post on insta without bluestacks or any tools! Step 1: Go to instagram and log into your insta account. step 2: Right click, and press inspect step 3: Click the button at the top that looks like a phone. It will look like that blue button at the top of the screen except yourswon'tt be blue until you click on it. And voila! Hopefully you have the little button of the camera that lets you upload images. But like I said, it won't work for all accounts, it work for 1 of mine and doesn't work on the other. Goodluck!