About the Online Tuner
The tuner listens through your microphone, detects the pitch of the note you play and shows the nearest note with a needle measured in cents. When the needle is in the green zone, the string is in tune.
Choose your instrument to see the target note for each string, or use chromatic mode for any instrument or voice. The reference pitch can be changed from A4 = 440 Hz for alternative tunings.
How to use the Online Tuner
- Click Start tuner and allow microphone access.
- Choose your instrument, then play one string at a time and let it ring.
- Turn the tuning peg until the needle sits in the green zone and the note turns green.
Standard tunings
| Instrument | Strings (low to high) |
|---|---|
| Guitar | E2 A2 D3 G3 B3 E4 |
| Bass (4-string) | E1 A1 D2 G2 |
| Ukulele | G4 C4 E4 A4 |
| Violin | G3 D4 A4 E5 |
Frequently asked questions
How do I tune a guitar with this online tuner?
Select Guitar, click Start tuner and allow the microphone. Pluck the low E string; if the needle is left of center tune up, if it is right tune down, until it turns green. Repeat for each string.
Is my microphone audio recorded?
No. The sound is analyzed live in your browser to find the pitch. Nothing is recorded, saved or sent anywhere.
What is a cent?
A cent is one hundredth of a semitone. Within about 5 cents of the target, most people hear a note as in tune.
Can I tune to 432 Hz?
The reference can be set between 415 and 466 Hz. Enter 432 in the Reference A4 field to tune to A = 432 Hz.