Real-time pitch detection in your browser

Free Online Pitch Detector

See your voice pitch in Hertz and musical notes live as you speak or sing. Detection runs locally in your browser — nothing is recorded or uploaded.

Real-time pitch detection

Detect your voice pitch live

Local-only processing

Current pitch

—Hz

Waiting for sound

Session stats

Robust low
—
Robust high
—
Median
—
Voiced
0.0s

Start detecting to draw a live pitch curve

55 Hz880 Hz
Pitch stability—

Vibrato

No clear vibrato detected

Allow microphone access when prompted. Your audio never leaves this page.

No audio or acoustic results are uploaded.

Pitch detection, explained

What is a pitch detector?

A pitch detector measures the fundamental frequency of a sound — how high or low it is — and displays it in Hertz. This free online pitch detector tracks your voice in real time, shows the nearest musical note with cents deviation, and draws a live chart of your pitch over the last ten seconds.

The detection uses the YIN algorithm, a robust fundamental-frequency estimator that works well on speech and singing. Every calculation happens locally in your browser with the Web Audio API, so your audio never leaves your device.

Who uses a pitch detector?

  • Singers — check that a note matches a target pitch and see cents deviation in real time.
  • Voice training — observe your speaking pitch range and how it moves through a sentence.
  • Range mapping — use the vocal range test to glide from a comfortable low note to a comfortable high note and see the detected span in notes and Hertz.
  • Instrument practice — use the microphone to check the pitch of your voice against a reference.
  • Curiosity — find out where your speaking voice sits on the pitch spectrum.

How to use this pitch detector

  1. Press Start Detecting and allow microphone access.
  2. Speak or sing — the current pitch, note name, and cents deviation update live.
  3. Watch the chart to see how your pitch moves over a 10-second window.
  4. Check the session stats for your minimum, maximum, and average pitch.

Understanding the live pitch readout

The large Hertz value is the current estimate of fundamental frequency, not loudness. The nearest note translates that frequency into equal-tempered musical notation, while cents show the small logarithmic distance from the note centre. A reading of zero cents means the measured frame is near that reference frequency; it does not prove that the note is correct for a song, because the detector does not know what you intended to sing.

Speech will make the display move quickly. Consonants may produce no pitch, and vowels rise or fall with intonation. For a steadier note reading, sustain one comfortable vowel at moderate volume. For conversational exploration, watch the curve rather than trying to freeze the display on a single number.

How to get a cleaner detection

Use a quiet room and place the microphone about a hand's length away. Avoid whispering, shouting, background music, and overlapping voices. Very breathy sounds, vocal fry, distortion, strong reverberation, and clipping can make the repeating period ambiguous. If the note jumps by an octave, simplify the sound and try again instead of treating the jump as a real range change.

The approximate 55–440 Hz tracking range covers many ordinary speaking and singing fundamentals, but it does not cover every instrument, whistle-register pitch, or extremely low sound. Consumer microphones and browser processing differ, so use the same device when comparing sessions.

For a useful comparison, choose one repeatable task before you start: hold the same comfortable vowel, read the same sentence, or sing the same unaccompanied note pattern. Keep your posture, microphone position, room, and volume similar, then compare the overall curve and session statistics rather than one flickering frame. Normal pitch varies from attempt to attempt, so look for a pattern across several clear sessions. A changed number shows that the captured signal changed; by itself, it does not prove that an exercise, warm-up, or training method caused the difference.

What a live detector cannot assess

A pitch detector does not measure vocal health, talent, identity, age, accent, resonance, formants, articulation, rhythm, or whether a complete performance is in tune. It follows one estimated periodic source at a time and has no reference melody or target note sequence. Accompaniment and harmony can confuse that single-pitch assumption.

It also shows only the note sounding right now. How far your voice reaches in either direction is a different question, which is why the vocal range test tracks the lowest and highest stable notes across a whole glide rather than a single frame.

Use the display as an educational practice aid, not as evidence about a person. Do not record someone without clear permission or use pitch for employment, education, housing, insurance, credit, healthcare, access, or identity decisions. If producing a sound causes pain or persistent hoarseness, stop and seek appropriately qualified professional support.

Private, temporary browser processing

Microphone frames are analysed in the current tab and used to update the readout and short chart. The site does not upload, save, or transmit the audio, pitch frames, note names, or session statistics. It does not create an account history or voiceprint. Stopping detection or leaving the page ends the temporary session.

For a full acoustic profile with pitch range, movement, spectral balance, and confidence, use the free online voice analyzer.

Related voice tools

Use a recorded analysis when you need robust session statistics, or test a comfortable low-to-high span after warming up.

Try the full voice analyzer →Try the voice pitch test →Try the vocal range test →

Pitch Detector FAQ

What is a pitch detector?▾

A pitch detector measures the fundamental frequency of a sound in real time and displays it in Hertz, often alongside the nearest musical note. This free online pitch detector uses the YIN algorithm to track your voice live in the browser.

How does a pitch detector work?▾

A pitch detector captures sound from your microphone and estimates the fundamental frequency — the lowest repeating cycle of the waveform — usually with an autocorrelation-based algorithm such as YIN. This detector also shows the nearest note and cents deviation.

What is YIN pitch detection?▾

YIN is a well-known fundamental-frequency estimation algorithm that uses a difference function and cumulative mean normalization to find the period of the signal. It is robust to noise and widely used in real-time pitch trackers.

What pitch range can this detector measure?▾

The detector tracks fundamental frequencies between approximately 55 Hz and 880 Hz. Sounds outside that range may not be tracked reliably. The chart window and note readout update live as you speak or sing.

Can I use the pitch detector while singing?▾

Yes. Sing a sustained note and the detector shows your pitch in Hz, the closest note name, and the cents deviation so you can see how far you are from a target pitch.

Is my audio uploaded by the pitch detector?▾

No. The pitch detector processes audio entirely in your browser. Nothing is recorded, stored, or sent to a server.

What is the difference between a pitch detector and a voice analyzer?▾

A pitch detector shows live frequency and musical notes in real time. A voice analyzer records a sample and summarizes pitch range, movement, spectral balance, and measurement confidence.

Why does the pitch detector sometimes jump by an octave?▾

Noise, breathy or creaky sound, harmonics, and rapid transitions can make a detector choose a multiple or fraction of the fundamental frequency. Try a clear sustained sound and repeat an implausible reading.