Is there a program that will allow me to upload my family tree to gensereunited

Question: Is there a program that will allow me to upload my family tree to gensereunited and ancestry!?

everytime I find new information I have to update both trees

so is there a file I can use to upload my main tree to websiteS!?Www@QuestionHome@Com

Best Answer - Chosen by Asker:

If you dont have a family tree programme, download PAF for free from here
http://www!.familysearch!.org/Eng/default!.!.!.!.

Once you have entered all your data, save a file in gedcom format!.
You can then use this to upload to any site!.Www@QuestionHome@Com