Hi,
Fat burners are not recommend nor required in case you are looking for fat loss. It is just a calorie deficit nutrition plan and physical activities that will help you lose your fat. Just eat less than your body requires and it would be good to gofer losing fat.
In case you are looking at Fat burners for that extra punch in your workouts, go for black coffee 15-20 minutes before workout which would help you get that kick and enhance your performance in gym.
I hope this helps.
Regards,
Gaurav Chauhan