hello.... can you tell me why my indoor palms are turning dry and brown around edges i do not over water could it be because they are next to sunny window

Move your palm further away, or off to the side from the sunny window, they do better in indirect/dapple light, otherwise, the tips can dry, then eventually, the whole frond will. If you don't think your over-watering, or even under-watering, if your using hard water and/or over-fertilizing, both can cause the tips to brown. Low humidity can be another reason.
Always keep an eye out for any pest.