Guitar Tuner
Tune a six-string guitar in standard, drop D, DADGAD, open tunings and more - by ear with reference tones, or with your microphone.
Tune up to the note, not down to it. Bring a flat string up slowly to pitch rather than overshooting and coming back down — it holds better that way. If a string feels unusually tight, or the pitch stops rising as you turn, stop: it is close to breaking.
Press start, then play a note.
The microphone is used only while you are tuning. Nothing is recorded and no audio leaves your device.
Tap a string to tune it on its own, or tap it again to hear its reference note. Leave none selected and the tuner will work out which string you played.
A4 = 440 Hz is the international standard and the right default. Some ensembles tune slightly differently by convention; no reference pitch is acoustically or scientifically superior to another.
More music tools
Microphone not working? Check it with the microphone test. Hearing nothing from the reference tones? Try the sound test.
Every tuning, not just standard
Standard EADGBE is the default, but the whole point of a tuner on a phone is the tunings you use rarely enough to forget. Drop D for one song, DADGAD for another, open G for slide, half a step down because the singer asked. All eleven are here, and each one relabels the strings and retargets the detector.
Tune up to the note, not down to it
Bring a flat string up slowly to pitch rather than overshooting and coming back down. A string approached from below settles and holds; one you have tuned down to sits on slack that works its way out over the next twenty minutes and goes flat again. If you overshoot, drop well below and come back up.
If a string feels unusually tight, or the pitch stops rising as you turn, stop. That is a string about to break, and it usually means you are tuning the wrong peg or a whole tone too high.
Automatic or one string at a time
Left alone, the tuner works out which string you played. That is faster, but it has a failure mode worth knowing: a string that is very badly out gets reported as its neighbour, because it genuinely is nearer that note. Tap the string you are working on and the tuner compares against that string only, however far off it is.
Tuning by ear
Tap a string twice to hear its reference note. Tuning to a played tone rather than a needle trains your ear, and it is the only option in a room too noisy for a microphone. Listen for the beating between the two pitches slowing down and stopping.
New strings
A fresh set will not hold pitch for a while. Tune it, play it, stretch each string gently by pulling it away from the fretboard, and tune again. Repeat until it stops moving - usually three or four passes.
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Quick answer
Choose your tuning, press start and play a string. The tuner names the string and shows whether it is sharp or flat. Tap a string to tune that one specifically, or tap it twice to hear its reference note. Tune up to pitch rather than down to it.
Key facts
- Eleven tunings including DADGAD and four open tunings
- Automatic string detection or manual selection
- Reference tone for every string
- A4 adjustable
- Works on phone, tablet and desktop
- Microphone audio is never recorded