Tuner
Tune any instrument with your microphone. Shows the nearest note, how many cents sharp or flat you are, and the frequency in Hz. Presets for guitar (standard, Drop D, DADGAD, half step down), bass, ukulele, violin, viola and cello, a reference pitch from A4 = 415 to 466 Hz, and reference tones you can play.
What does this tuner do?
It listens to your microphone, finds the pitch of the note you play or sing, and shows how far it is from the nearest note in cents (1/100 of a semitone). When the needle is in the middle and turns green, you are in tune.
How to use
- Press Start and allow microphone access.
- Choose your instrument, or Chromatic to tune to any note.
- Play one string or note at a time and let it ring.
- If the needle is left of center (flat), tighten the string; if it is right (sharp), loosen it. Stop when it turns green.
- Click a string button to hear its reference tone and tune by ear.
Tunings
| Instrument | Strings (low to high) |
|---|---|
| Guitar | E2 A2 D3 G3 B3 E4 |
| Guitar Drop D | D2 A2 D3 G3 B3 E4 |
| Guitar DADGAD | D2 A2 D3 G3 A3 D4 |
| Guitar ½ step down | E♭2 A♭2 D♭3 G♭3 B♭3 E♭4 |
| Bass | E1 A1 D2 G2 |
| 5-string Bass | B0 E1 A1 D2 G2 |
| Ukulele | G4 C4 E4 A4 |
| Violin | G3 D4 A4 E5 |
| Viola | C3 G3 D4 A4 |
| Cello | C2 G2 D3 A3 |
Features
- Chromatic tuning for any instrument or voice
- Cents and Hz display; within ±5 cents is shown as in tune
- Reference pitch A4 = 415 to 466 Hz (440 Hz by default, 442 Hz for many orchestras, 415 Hz for baroque)
- Sharp (♯) or flat (♭) note names
- Reference tones for every string
FAQ
Is my microphone audio sent anywhere?
No. The sound is analyzed in your browser and is not recorded, saved or uploaded. Only your settings (instrument, reference pitch and note names) are saved in this browser.
How does it detect the pitch?
It uses the YIN algorithm, which looks for the period at which the sound repeats itself. It ignores quiet sounds and noise, and smooths the result over the last few readings so the needle does not jump between octaves.
The reading jumps around.
Play one string at a time, mute the others, and move closer to the microphone. Low bass notes need a moment to settle; let the string ring.
It says the microphone was denied.
Allow microphone access for this site in your browser's address bar or settings, then press Start again.