of your own free will

of (one's) own free will

Done according to one's own volition, without pressure or influence from others. She decided of her own free will to drop out of art school and pursue a career in law.
See also: free, of, own, will
Farlex Dictionary of Idioms.

of your own free ˈwill

because you want to do something rather than because somebody has told or forced you to do it: She left of her own free will.
See also: free, of, own, will
Farlex Partner Idioms Dictionary
See also:
  • of (one's) own free will
  • on (one's) own volition
  • do something in your own sweet time/way
  • in (one's) own sweet time
  • of (one's) own accord
  • of one's own accord
  • of own accord
  • of your own accord
  • on one's own account
  • at will