More 36+ Acoustic Electric Guitar Tuner. You have found the fastest and right way to tune your guitar 🎸. The online guitar tuner is fully chromatic but if you need a reference of a specific tuning and tune by ear read: Keep that acoustic, electric, bass guitar or ukulele in tune with these top drawer strobe, polyphonic and chromatic tuners. The tuning will be done using the free online guitar tuner, working through a microphone on your device.