Instrument Tuner
betaThis free chromatic instrument tuner uses your microphone to detect the pitch you play and shows the nearest note with a cents meter so you can tune precisely. Great for guitar, ukulele, violin, bass or voice. The audio is analysed in your browser and never uploaded.
Tune a guitar, ukulele, violin or voice with your microphone. Play a note and the tuner shows the pitch and how many cents sharp or flat you are. Audio stays on your device.
Pluck a single string cleanly and let it ring for the steadiest reading.
How to use Instrument Tuner
- 1 Press Start tuner and allow microphone access.
- 2 Play a single note or pluck one string cleanly.
- 3 Read the detected note and the cents meter — centre and green means in tune.
- 4 Adjust your instrument until the needle sits in the middle.
Frequently asked questions
What instruments can I tune?
It is a chromatic tuner, so it works for guitar, bass, ukulele, violin, wind instruments and even voice — anything with a clear pitch.
Is my microphone audio uploaded?
No. The pitch is detected locally in your browser; nothing is recorded or uploaded.
What does "cents" mean?
Cents measure how far a note is from being perfectly in tune — 100 cents is one semitone. Within about ±5 cents is considered in tune.
Does it work offline?
Yes. As a PWA it keeps working with no connection once loaded.