After much wait, Instagram has at last launched proper web profiles for its users. Many third party websites have been doing web versions of Instagram profiles for a very long time now. Why it took Instagram so long, who knows.
With the service being owned by Facebook the profiles of course have a very Facebook-like look, with the avatar being on the left and a cover picture. But the cover picture is made up of your own Instagram pictures. It looks great.
The web version now allows users to follow profiles, comment and like photos. You can also edit your own profile.
As expected you can't upload pictures through the web version. The ability to upload pictures is staying exclusive to Instagram's mobile apps for iOS and Android.
This is a welcomed feature which I personally think should have been available since the beginning of Instagram.
To view your profile you simply put your username at the end of this url - http://instagram.com/YOURUSERNAME
Unfortunately not all profiles have got the web version yet. So your profile may not be immediately available. All profiles will get the web version in the next few days. However if you're looking for an example I recommend checking out Nike's profile - http://instagram.com/nike