Online Guitar Tuner
Tune a guitar, bass, ukulele or violin with your microphone. Shows the detected note and how many cents sharp or flat you are.
Runs on your device
What it does
Play one string at a time near the microphone. The tuner detects the pitch, names the nearest note, and shows how far off it is in cents.
How to use it
- Press Start and allow microphone access.
- Play one string and let it ring.
- Tighten or loosen until the needle is centred.
When it helps
- Tuning before practice.
- Checking intonation.
- Tuning ukulele and violin.
Questions
What is standard guitar tuning?
E2 A2 D3 G3 B3 E4, from the thickest string to the thinnest.
Can I change the reference pitch?
Yes, from 430 to 450 Hz. Most music uses A4 = 440 Hz.
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