Free Online Guitar Tuner
Tune your guitar in seconds, accurate, browser-based, works on any device.
Tune your guitar in three steps.
Allow microphone access
Click the orange microphone button. Your browser will ask permission to use your mic, say yes. Nothing is recorded or stored, the audio is processed locally on your device.
Pluck a string
Pluck any string clearly. The tuner will detect which string you're playing and tell you whether it's flat, sharp, or in tune. The needle on the dial shows you which way to turn the tuning peg.
Tune to the centre
If the needle leans left, your string is flat, tighten the peg. If it leans right, you're sharp, loosen it. When the needle sits centre, the string is in tune. Repeat for all 6 strings.
Common alternative tunings
In tune is just the beginning. Now what do you play?
If you've got a guitar in tune but you're stuck on what to actually do with it, my beginner course Learn, Practice, Play is a 7-module roadmap from your first chord to playing real songs.