Open the Tool: Visit the official Insta DP Viewer website https://instadp.io/.

Enter Username: In the provided field, enter the username of the Instagram account whose DP you want to explore.

Click "View DP": After entering the username, click on the "View DP" button.

Enjoy the Full-Sized DP: In a matter of seconds, the tool will retrieve and display the profile picture in its full glory. You can now zoom in, explore, and appreciate the details that might have gone unnoticed before.