Chromatic Tuner

A chromatic tuner names any of the twelve equal-tempered notes instead of only the strings of one instrument's tuning. This chromatic tuner listens through the microphone and shows the closest note, its frequency in hertz and the signed distance from it in cents.

A cent is one hundredth of a semitone. The chromatic tuner reports the distance from the nearest note in cents: positive is sharp, negative is flat, and a note within five cents is marked in tune.

The A4 reference is the pitch everything else is measured from, and 440 Hz is concert pitch. Move it between 415 Hz and 466 Hz when the chromatic tuner has to match an instrument or a recording that sits away from concert pitch.

The chromatic tuner needs microphone permission and a quiet room, and it hears one note at a time, so a chord or a noisy signal gives no steady reading. Its search band runs from 50 Hz to 1500 Hz, it does not record the audio it hears, and it names the nearest equal-tempered pitch rather than transcribing a performance.

Every note a guitar plays sits inside the chromatic tuner's 50 Hz to 1500 Hz band, so all of them read. For standard tuning shown as a row of six strings, a dedicated page lists E2 82.41 Hz, A2 110 Hz, D3 146.83 Hz, G3 196 Hz, B3 246.94 Hz and E4 329.63 Hz.

No account and no credits: the chromatic tuner runs in the browser, so nothing is charged and the microphone audio never leaves the page.

The name jumps when a pitch sits near the midpoint between two notes, or when background noise competes with the note. Hold one note steadily in a quiet room and the chromatic tuner settles on the nearest name.

Chromatic Tuner runs in the browser and draws zero credits.