Free Online Chromatic Tuner
Play any note on your instrument and see instant visual feedback. Works with guitar, bass, ukulele, and more.
Play any note on your instrument and see instant visual feedback. Works with guitar, bass, ukulele, and more.
Capture runtime metrics locally and export JSON for troubleshooting.
Click Start Tuning, allow microphone access, and play a note. The tuner detects the pitch, shows the nearest note name (C, D, E, F, G, A, B), and displays how many cents sharp or flat you are. A cent is 1/100th of a semitone. Adjust your tuning peg until the needle centers and the display turns green.
A chromatic tuner recognizes all twelve notes of the chromatic scale, so it works with any instrument — not just guitar. Whether you play bass, ukulele, violin, viola, cello, trumpet, saxophone, flute, or sing, a chromatic tuner will identify the note you're playing and tell you exactly how to adjust.
The note A above middle C is the universal reference pitch. The international standard is 440 Hz, but orchestras sometimes tune to 442 or 443 Hz for a brighter sound. You can change the reference pitch in the settings.
Yes — 100% free, no ads, no account, no limitations.
Yes. It works in any modern browser with microphone access, including Safari on iPhone and Chrome on Android. You can also install it as a home screen app for offline use.
No. All processing happens locally in your browser. Your audio is never sent to any server.
The tuner uses an FFT-accelerated YIN algorithm with sub-cent accuracy — comparable to dedicated hardware tuners.