Online chromatic tuner with microphone
Tune any real instrument with your microphone. Play a single note and the tuner shows the nearest note name, its frequency in hertz and how far off it is in cents, with a needle that centres when you are in tune.
Because it is chromatic, it works for guitar, bass, violin, ukulele, flute and singing alike. Reference notes for seven instruments let you tune by ear, and you can calibrate A4 from 432 to 444 Hz. The sound is analysed in your browser and never recorded or uploaded.
How to tune with your microphone
- Press Start tuner and allow microphone access.
- Play one string or note at a time, close to the microphone, in a quiet room.
- Flat means the note is too low, so tighten the string; sharp means too high, so loosen it.
- Within 5 cents of the note, the tuner shows In tune.
Tune by ear with reference notes
- Pick your instrument: guitar, guitar in Drop D, bass, ukulele, violin, cello or banjo.
- Press a string to hear its note, then match your string to it.
- Set A4 to 442 Hz or another pitch if your band or orchestra tunes higher or lower.
Standard tunings
- Guitar: E A D G B E, from the thickest string to the thinnest.
- Bass guitar: E A D G.
- Violin: G D A E.
- Ukulele: G C E A.
Frequently asked questions
Can I tune a real guitar with the online tuner?
Yes. Allow microphone access, play one string near the microphone and turn the peg until the tuner shows In tune.
Does the tuner record or upload my audio?
No. The microphone signal is analysed in your browser to find the pitch. Nothing is recorded or sent anywhere.
What does cents mean on a tuner?
A cent is one hundredth of a semitone. The tuner shows how many cents your note is above (sharp) or below (flat) the nearest note.
Why does the tuner show the wrong note?
Play a single note at a time and keep background noise low. Chords and very quiet notes make the pitch hard to detect.