Instrument Tuner
A browser-only tuner using microphone waveform autocorrelation. Choose a standard tuning and play one clear note at a time.
Microphone access is required; audio stays in this browser.
Press Start and play one note
A QUICK WALKTHROUGH
How to use this tool
- Choose guitar, ukulele, or bass.
- Allow microphone access and start the tuner.
- Play one sustained string and adjust toward zero cents.
Supported tunings
Standard guitar EADGBE, standard ukulele GCEA, and standard four-string bass EADG.
Limits and privacy
Audio is processed locally and not uploaded. Noise, quiet signals, multiple notes, and notes outside the expected range can prevent a reading. A result is guidance, not a calibrated measurement.
GOOD TO KNOW
Common questions
How does pitch detection work?
Autocorrelation estimates the waveform period, then the frequency is compared with the nearest target note.
What does cents mean?
A cent is one hundredth of a semitone; values near zero are closer to the target.