Instagram is a social networking app that's designed for use on a mobile device. The idea is to capture images using the app and post them directly to your account for others to like or share. The only things you can do on a desktop or laptop computer is set up an account, add a profile picture, and input a bio and website. Posting videos and photos can only be done using a mobile device.
However there may be times when it's easier to post pictures from a PC. This can be especially true for businesses that are using Instagram as a promotional tool. You may have a lot of images on your computer that you need to post to multiple social media sites. Instagram is the only one of those sites that can make that a challenge to do. However, there is a way to trick Instagram on a desktop computer or laptop and make it act like or emulate a mobile app. And it's completely free.
One way you can get images from your computer to Instagram is to email the picture to yourself, open the email on your mobile device, take a screenshot from your email, crop the image, and then share it to Instagram. That's actually easier than it sounds. But if you don't want to go to all that trouble, there is a simple workaround.
On the Chrome browser you'll see three vertical dots in the top right hand corner. Click on those dots, then choose More Tools, then Developer Tools. A split screen will open up. Instagram will be on the left and a screen with code on the right. Next to Elements on this screen you'll see what looks like a mobile phone. This tool shows developers how their websites will look and behave on a mobile device. You can use it to trick Instagram into functioning on your PC the same way it functions on your smartphone.
I've highlighted the mobile phone icon in pink in the picture below, so you'll know exactly what to look for. When you click this you'll see a mobile version of your Instagram account. You can use it to upload pictures directly from your PC.
You'll see "Post a Photo" at the bottom of your app. When you click it, it will allow you to upload any picture on your drive.
That's all there is to it. Once you've uploaded a photo you click Next to add text. Then click Share to post it. It's fast, it's free and it's easy.