An Instagram DP viewer allows you to view someone's Instagram profile picture in full size. There are various websites and apps that offer this service. Here are the steps to use an Instagram DP viewer:
Open Instagram and go to the profile of the person whose profile picture you want to view.
Click on the three dots in the top right corner of the screen and select "Copy Profile URL" from the menu that appears.
Go to the Instagram DP viewer website or app of your choice.
Paste the copied URL in the search bar provided by the website or app.
Click on "View" or "Search" and wait for the website or app to fetch the profile picture.
Once the profile picture is displayed, you can download it or save it to your device if the website or app provides that option.
Keep in mind that using an Instagram DP viewer to view someone's profile picture without their consent is a violation of their privacy. It's important to respect people's boundaries and not misuse such services.