StoreGuitar Tuner
Free, right in your browser. Use your phone or computer's mic, or plug in your guitar.
The sound never leaves your device: the tuner listens inside your browser, and nothing is recorded or sent.
The Fret Arcade games use standard tuning.
How to tune your guitar
Allow the microphone (or your audio interface). On a phone, hold it close to the guitar, in a quiet room.
Let it ring. Pick gently: a hard pick makes the note go sharp for a moment.
Too low (flat): tighten it. Too high (sharp): loosen it. Stop when the needle is in the green and it says in tune.
If a string is sharp, loosen it a little below the note, then bring it back up. It stays in tune longer.
Tuning one string pulls on the neck a little, so the others can move. A second pass is quick.
Guitar tunings
Pick one from the list above the tuner, or tap a tuning here. The strings go from the thickest to the thinnest.
Standard tuning
E A D G B EThe tuning nearly every song, lesson and chord chart uses, and the one the Fret Arcade games use.
Tune to standard →Drop D
D A D G B EOnly the thickest string drops a whole step, so a power chord on the three low strings takes one finger. A favorite for heavy rock riffs.
Tune to Drop D →Half step down
E♭ A♭ D♭ G♭ B♭ E♭Every string a half step lower. The strings feel a little looser for bends and the sound is slightly darker. Play the usual shapes.
Tune half step down →Full step down
D G C F A DEvery string a whole step lower, for a heavier, deeper sound with the same chord shapes. Thicker strings help it stay in tune.
Tune full step down →Open G
D G D G B DStrum the open strings and you hear a G major chord. Lay one finger across a fret for other chords: great for slide and rhythm playing.
Tune to Open G →Open D
D A D F♯ A DThe open strings ring a D major chord, deep and full. Popular for slide guitar and folk.
Tune to Open D →DADGAD
D A D G A DAn open, ringing sound that's neither major nor minor. A favorite for fingerstyle and Celtic music.
Tune to DADGAD →Open E
E B E G♯ B EThe open strings make an E major chord. Three strings tune up, so go slowly to spare them, and tune back down when you're done.
Tune to Open E →Questions
Is the tuner free?
Yes. It runs in your web browser, with nothing to download or install and no account needed.
Can I tune my guitar with my phone?
Yes. Open this page on your phone, tap Start tuner and allow the microphone. Hold the phone close to the guitar, in a quiet room, and play one string at a time.
Does it work for acoustic and electric guitars?
Yes. An acoustic tunes best with the microphone. An electric tunes best plugged into an audio interface or a guitar-to-USB cable; unplugged, it works with the microphone too if you hold it close, because an electric is quiet without an amp.
Is my sound recorded or sent anywhere?
No. The tuner listens inside your browser, on your own device. Nothing is recorded, saved or sent to us or anyone else.
Why does the needle jump around on the low strings?
Low strings vibrate slowly, so they take a moment to read, and a hard pick makes any string go sharp for an instant. Pick gently, let the string ring, and keep the other strings quiet.
Which tuning do the Fret Arcade games use?
Standard tuning, E A D G B E. Use the tuner in any tuning you like, then tune back to standard before you play the games.
What is A440?
It is the pitch most music is tuned to: the A above middle C vibrating 440 times a second. This tuner uses it, so your guitar will match other instruments, recordings and backing tracks.
How do I tune my guitar with an audio interface?
Plug the guitar into the interface's instrument (Hi-Z) input, choose Plugged in above the tuner, then press Start tuner and allow access. If your computer has more than one input, pick the interface from the Input list. Set the gain so the level meter moves when you play but stays out of the red.
Why won't my guitar stay in tune?
New strings stretch for the first few days, so they keep going flat: tune them often, or gently pull each string away from the neck a few times to settle it. Always tune up to the note, not down to it. Big changes in temperature or humidity also move the tuning, so check it whenever you pick the guitar up.
The tuner says in tune, but my chords sound off. Why?
Pressing the strings too hard pulls them sharp, so press just hard enough for a clean note. New strings can do it too while they settle. If notes high up the neck are always out when the open strings are in tune, the guitar's intonation needs adjusting, a quick job for a guitar shop.
Can I tune a bass or a ukulele with it?
Not yet. It's made for six-string guitar: a bass's low strings are too low for it to hear, and a ukulele's tuning isn't in the list.
Do I need to tune before playing the Fret Arcade games?
Yes, in standard tuning: the games listen for each note you play, and a string that's out of tune can be heard as the note next to it. While you play, they also listen for a guitar drifting out of tune, and offer the tuner when it does.