I created a tool that will let you easily visualize graph problems' input. I have used the same format as used by most of the problems.
Originally I created this for leetcode. I have recently updated it to accept plain text input as well so I'm sharing this here as well.
Sample Questions whose input graph array can be just copy/paste to visualize.
Let me know if you have any thoughts, comments or suggestions.
Give it a star on Github if you find it helpful. :)