Online Guitar Tuner
Tune your guitar in seconds using your microphone or by ear with reference tones.
Select a string and play it near your device. The tuner will detect the pitch and show you whether you're sharp, flat, or in tune. If microphone access isn't available, use the reference tone mode to hear the correct pitch and tune by ear.
Press Start to begin tuning
Target: Low E - 82.41 Hz
How to Use the Guitar Tuner
Click the microphone button to start listening. Play an open string on your guitar and watch the tuner respond. The indicator shows whether the note is sharp (too high), flat (too low), or in tune. Tune each string one at a time from low E to high E. If your browser doesn't support microphone input, switch to reference tone mode to hear the correct pitch for each string.
Standard Guitar Tuning (EADGBE)
Standard tuning for a six-string guitar is E-A-D-G-B-E, from the thickest string (6th) to the thinnest (1st). The frequencies are: E2 (82.41 Hz), A2 (110.00 Hz), D3 (146.83 Hz), G3 (196.00 Hz), B3 (246.94 Hz), and E4 (329.63 Hz). This is the most widely used tuning for guitar and the default for most music.
Frequently Asked Questions
How accurate is this online guitar tuner?
The tuner uses your device's microphone and real-time pitch detection to identify notes accurately. For best results, tune in a quiet environment.
Does the tuner work on mobile phones?
Yes. The tuner works on most modern mobile browsers. You'll need to allow microphone access when prompted. If that isn't possible, use the reference tone mode.
What is reference tone mode?
Reference tone mode plays the correct pitch for each string through your device's speaker. You listen to the tone and tune your string to match it by ear.