Guitar Tuner Free Online Tuner With Microphone

About this tool

Tune your guitar in seconds with this free online guitar tuner. It listens through your phone or computer microphone, shows the note you are playing and a needle that tells you whether to tighten or loosen the string. It has standard tuning, Drop D, half step down, DADGAD, open tunings, bass and ukulele, plus reference tones to tune by ear.

Quick answer: Pick your tuning, press Start tuner and allow the microphone. Play one string at a time and let it ring. If the needle is left of centre the note is too low, so tighten the string; right of centre is too high, so loosen it. When it turns green and says In tune, move to the next string.

How to tune a guitar with the microphone

1. Choose Guitar: Standard (or another tuning) and press Start tuner. Allow the microphone when your browser asks.
2. Hold the phone or laptop close to the guitar and play the thickest string, 6th string E, on its own.
3. Watch the big note name and the needle. Turn the tuning peg slowly until the needle sits in the green zone.
4. Repeat for strings 5 to 1. Then check them all once more, because tuning one string can pull the others slightly.

Tip: always tune up to the note. If a string is too high, loosen it below the note first, then tighten up to it. The string holds its pitch better that way.

Standard guitar tuning notes and frequencies

Other tunings in this tuner

• Drop D: D A D G B E, the 6th string lowered a whole step for heavy riffs and easy power chords.
• Half step down: Eb Ab Db Gb Bb Eb, every string a semitone lower.
• Drop C, DADGAD, Open G, Open D: popular alternate tunings for rock, folk and slide.
• Bass (4 and 5 string), ukulele (G C E A) and chromatic mode for any instrument.

No microphone? Tap a string button to hear its note and tune by ear until the two sounds stop wobbling against each other. Keep time with the free online metronome, and if the tuner shows nothing, check your microphone with the mic test.

FAQ

Does the guitar tuner work on my phone?

Yes. It works in Chrome, Safari, Edge and Firefox on phones, tablets and computers that have a microphone. Your browser asks for permission the first time.

Why does the note jump around?

Play one string at a time, mute the others with your hand, and tune in a quiet room. A freshly plucked string can sound slightly sharp for a moment, so let it ring and read the needle after a second.

What does 440 Hz mean?

It is the standard pitch for the A above middle C, and most music is tuned to it. Change the reference pitch only if your band or recording uses a different one, such as 442 Hz.

Is my playing recorded?

No. The sound is analysed live inside your browser to find the pitch. Nothing is recorded or sent anywhere, and the microphone turns off when you press Stop tuner.