Home / Guitar tuner
Free browser tool
Online Guitar Tuner
Tune one string at a time with your device microphone. Play a clear, steady note and adjust the string until the needle settles near the center.
—Waiting for sound
— Hz
Standard guitar tuningE A D G B E
E6th · 82 Hz
A5th · 110 Hz
D4th · 147 Hz
G3rd · 196 Hz
B2nd · 247 Hz
E1st · 330 Hz
Tip: Mute the other strings and play each one separately. A quiet room and a microphone close to the guitar help the tuner lock on.
How to use the online tuner
Why does the tuner need microphone access?
Your browser analyzes the pitch picked up by your microphone so it can identify the note. Audio is processed locally in this page and is not uploaded to a server.
Can I use this with an electric guitar?
Yes, if the microphone can hear the amp or guitar clearly. A direct interface can also work when your browser exposes it as an audio input.
What if the note jumps around?
Play one string at a time, let the note ring, and reduce nearby noise. The tuner may have trouble with very quiet notes, heavy distortion, or several strings ringing together.