Free tools for your next audio edit
Vocal pitch monitor. See the note you sing.
Sing a sustained note and see an approximate pitch, nearest note and cents from that note. Start your microphone when ready; analysis stays in your browser.
Monitor your vocal pitch
Free · localStart the microphone and sing one steady note in a quiet room. This is an estimate from roughly 80–1,000 Hz, using A4 = 440 Hz. The microphone is not played through your speakers.
Current estimate
The microphone is off.
Audio is analyzed in this browser, not recorded or uploaded. Noise, multiple notes, overtones, vibrato and device processing can cause unstable or octave errors. This is not a calibrated tuner or a vocal-range assessment.
A quick pitch check
How to use the vocal pitch monitor
Use one sustained note and treat the reading as an estimate, not a score.
- 01 / START
Allow microphone access
Choose Start pitch monitor and grant permission. The browser processes the live signal locally; the tool does not record or upload your voice.
- 02 / SING
Hold one comfortable note
Use a quiet room and avoid playing accompaniment into the microphone. Sing steadily at a comfortable distance. The display shows the nearest note, frequency and cents when it detects a periodic signal.
- 03 / STOP
End microphone access
Choose Stop microphone when finished. Leaving the page also stops the stream. If the display does not respond, check browser permissions and the microphone test.
Understanding the reading
What do the note, Hz and cents mean?
Frequency in hertz describes cycles per second. The monitor maps an estimated frequency to the nearest equal-tempered note using A4 = 440 Hz. For example, an estimated 440 Hz maps to A4 at approximately 0 cents; 100 cents is one semitone. Negative cents indicate a pitch below the displayed note and positive cents above it.
The tool examines a short window of microphone samples using normalized autocorrelation and looks for a strong periodic pattern. It attempts pitches from approximately 80 to 1,000 Hz. The result can jump an octave, miss a note, or follow background music instead of the singer. Vibrato and changing notes naturally change the reading. Treat any number as a momentary estimate, not proof of tuning accuracy or vocal health.
Some browsers and devices apply input processing even when the tool requests it be disabled. The monitor does not play or save the input, detect multiple voices separately, measure a vocal range, or change pitch. For a saved recording, try the separate audio pitch changer; for a generated reference, use the tone generator.
A few useful answers
Free vocal pitch monitor questions
How do I use the vocal pitch monitor?
Start the monitor, allow microphone access, and sing one steady note in a quiet room. The display estimates frequency, nearest note and cents relative to that note using A4 = 440 Hz. Stop the microphone when finished.
Is my voice recorded or uploaded?
No. This tool analyzes the live microphone signal in the browser; it does not record or upload audio. The microphone is active only after permission and starting the monitor, until stopped or the page is left.
Why does the note jump or disappear?
Quiet input, background sounds, multiple notes, overtones, vibrato, device processing or a pitch outside the approximate 80–1,000 Hz detection range can make the estimate unstable. Try a sustained note closer to the microphone in a quiet room.
What do cents mean?
A semitone contains 100 cents. The number shows the estimated pitch's distance from the nearest equal-tempered note using A4 = 440 Hz; negative is below and positive is above. It is not a calibrated measurement or a judgment of a performance.
Does this measure my vocal range or correct pitch?
No. It displays a momentary estimate for one roughly periodic sound and does not save a history, calculate your vocal range, play your microphone, or correct a recording.
After preparing your audio