I need that tuner!

the ukulele is hard to practice when it's out of tune and I haven't gotten my tuner yet. I'm gonna try an online tuner today but not sure that it will work. I tried my cords and tried to work on the change of chords from one to the other. that's hard. I find the G cord to be the toughest so far. A and D are EASY! this is gonna be a LONG JOURNEY to learning how to play this thing! :)