How old are you, @sparkle17 , and is the creaking associated with any swelling? I am not a doctor, but if you are over 50 and/or there is swelling, I'd get this checked out by a doctor or a physiotherapist. It could just be a sign that your knees are not as strong as they should be, or it could be onset of arthritis, the result of injury etc.
Assuming it's the former, here are some knee strengthening exercises courtesy of Dr Jo, a doctor of physiotherapy who has lots of exercise videos on YouTube:
Lucy's Thighs and Glutes is excellent for strengthening not just thighs and glutes, but also hip flexors and knees: