Online Ukulele Tuner from Full step down ukulele tuning. br The open strings of the ukulele from low to high are as follows:br br • F - the 4th string br • A# - the 3rd string br • D - the 2nd string br • G - the 1st string br Ukesong offers you an advanced online ukulele tuner to keep your ukulele always in tune without the need of an electronic tuner.