Instagram on the web allows you to use the social media app on a computer. It offers a similar experience to using the app, with a few key exceptions.
To send DMs on Instagram from a computer, head to the Instagram website and click the paper plane icon in the top-right.
Once upon a time, the only way to get your photos uploaded to Instagram officially was to use the app. Sure, you could get a third party service to help, but do you really want to add yet another ...