Online Tuner for Most Instruments

Tune your guitar online with your microphone. A free, accurate tuner for acoustic and electric guitar in standard, drop D or any of 45 tunings.

Tune your guitar with your microphone in standard, drop, open or alternate tuning, 45 tunings in all. Standard tuning is E A D G B E , from the 6th (thickest) string to the 1st (thinnest). Pick another tuning in the menu above, and this table, the headstock and the reference tones change right away. Press Start tuning and allow microphone access. Choose standard, drop D or any of the other tunings, then pluck one string and let it ring.