No. That is not healthy. There are tons, and tons of resources on the internet about how to lose weight in a healthy manner.
The body requires a minimum of 1200 calories just to keep you alive and breathing. If you eat less than this minimum amount your body will go into starvation mode and you are less likely to lose weight because your body thinks it is dying.
There are a ton of different calorie calculators to tell you what your recommended calorie intake for the day should be. Many of these factor in your weight, your activity level, and your weight loss goals.
You also have to be eating healthy foods for this to work. Whole grains, fruits, vegetables, lean proteins.
But you also need to exercise to burn off some of your existing fat. You don't have to go crazy. Walking at a brisk pace or riding a bike does wonders. Find a sport that you enjoy so it feels like fun instead of exercise.