The answer to the question is, yes.
Across the World Wide Web, you will be able to find many places that offer a free diet plan. However, not all of those will be healthy or help one to lose weight. Some of the sites will offer a free diet plan, but once it is further investigated, one will find it is merely a fad.
A smart way to find a good free diet plan is to speak to your doctor and follow his/her recommendation. Most medical professionals recommend a 1,200 to 1,500 calorie a day plan (depending on the person and circumstance). It will hardly ever be recommended to go below 1,200 calories per day or you could lose your hair, your muscles, and all your friends due to irritability.
Most anyone who offers a free diet plan will include a menu full of fruits, vegetables and lean protein. This is a sensible and healthy way to eat anyway. Cutting down on fat intake as well as carbohydrates and including exercise will usually help anyone lose weight.
Of course there is the ultra ridiculous category you will come across when searching for a free diet plan. So beware.
Basically a free diet plan can be achieved at anytime. It is a healthy way of eating and changing lifestyle habits to get to a more lean you.