As of 2016 it is possible to sign up for Instagram without the mobile app.
While Instagram was originally only available through its mobile app, now it has a web service which works like Facebook or Pinterest.
Follow these instructions to create an Instagram Account from a computer:
- Go to instagram.com
- Decide whether you want to sign up with your email address or with Facebook.
- Enter your email address, create a username and password or click Log in with Facebook to sign up with your Facebook account.
- If you register with an email click Sign up. If you sign up with Facebook you will be prompted to login to your Facebook account if you’re currently logged out.
Alright, alright, alright.