Pitch Detector Online
Sing, hum, or play into your mic and read the pitch live — exact frequency in Hz, the nearest note, and a cents meter. Free, real-time, and nothing is recorded.
Your browser will ask for microphone access — the sound is analyzed on your device and never uploaded.
How to Detect the Pitch of Any Sound
No file, no account — just your microphone.
Allow the Microphone
Press Start and allow mic access when the browser asks. The sound is analyzed on your device — nothing is recorded.
Make a Sound
Sing, hum, whistle, or play a single note on your instrument. One clear pitch at a time works best.
Read the Pitch
The frequency in Hz, the nearest note, and the cents meter update live as you hold or bend the note.
A Real Tuner Readout, Right in the Browser
Frequency, note, and cents — live, private, and free.
Truly Real-Time
The pitch updates on every animation frame — sing a note and watch the frequency move with your voice, with no upload and no processing wait.
Hz, Note, and Cents
You get the exact frequency in hertz, the nearest musical note, and a cents meter showing how far sharp or flat you are — the full tuner readout.
Steady Readout
A rolling median over recent frames keeps the number from jittering, so held notes read as one steady pitch instead of a flickering guess.
Nothing Is Recorded
The microphone signal is analyzed on your own device, frame by frame, and thrown away. No audio is stored, uploaded, or sent anywhere.
Voice or Instrument
Works on anything with a single clear pitch — singing, humming, whistling, guitar strings, piano keys, violin, brass, and woodwinds.
Works on Mobile
Runs in the browser on iOS, Android, Chrome, Firefox, Safari, and Edge — your phone's mic is all you need.
Your Mic Stays on Your Device
The detector analyzes the microphone signal frame by frame on your own device and throws it away. No audio is recorded, stored, uploaded, or used for anything — and the mic switches off the moment you press Stop.
No Recording
Frames are analyzed and discarded
No Upload
The analysis runs in your browser
You're in Control
Stop ends mic access instantly
What People Detect Pitch For
One live readout for every “what pitch is that?” moment.
Tune by Ear, Verified
Check a string against the exact Hz and cents instead of trusting your ear alone
Singing Practice
Hold a note and watch the cents meter to train pitch accuracy
Find a Melody's Pitches
Hum a tune note by note to work out what you're actually singing
Check an Instrument
See whether an old piano or a synth patch is at concert pitch
Ear Training
Guess the note first, then sing it and let the detector grade you
Sound Design
Read the fundamental frequency of a sample or drone before you tune it
What Pitch Am I Actually Singing?
Every musician hits this question eventually. You’re matching a melody by ear, tuning an instrument without a tuner in reach, or trying to figure out whether that note you keep landing on is an A or a B-flat. A pitch detector — the same tool people search for as a pitch finder or pitch recognizer — answers it directly: make the sound, and the screen shows you the frequency in hertz, the closest musical note, and exactly how far sharp or flat you sit.
Frequency, note, and cents — what the readout means
Every pitched sound has a fundamental frequency, measured in hertz — the A above middle C is 440 Hz by convention. The detector finds that frequency in the live microphone signal and maps it to the nearest note of the scale. The cents meter fills in the detail between notes: a cent is a hundredth of a semitone, and the needle shows where you sit between 50 cents flat and 50 cents sharp. Within about ten cents of center, you’re in tune — that’s the same reading a chromatic tuner gives, which is why this doubles as one.
Getting a clean reading
Pitch detection works on one clear pitch at a time. A held vowel, a whistled tone, or a single plucked string locks in immediately; chords, heavy room noise, and very breathy or very quiet sounds don’t have a single frequency to find, so the readout goes blank until the signal clears up. If the number seems an octave off on a very low voice or bass note, that’s a classic quirk of all pitch detectors — sing the note an octave up and halve it mentally, or move closer to the mic.
Live and private by construction
Everything happens on your device. The microphone signal is analyzed frame by frame in the browser and immediately discarded — there is no recording, no upload, and no server on the other end. That’s also why it’s instant: the readout follows your voice with no processing delay, which makes it genuinely usable for practice, not just for one-off checks.
From reading pitch to fixing it
Knowing the pitch is step one; the rest of the toolkit handles step two. If you just want the note name without the numbers, the note identifier shows your note on a piano keyboard, and the vocal pitch monitor draws your pitch over time for practicing held notes and vibrato. To tune a recorded vocal to the right notes, run it through online autotune; to move a whole track up or down, use the pitch changer; and to find a full song’s key rather than a single note, the BPM & key detector reads it straight from the file.
Now Fix the Pitch, Not Just Read It
The full Notevibes Online Audio Editor tunes vocals, shifts pitch, detects key and tempo, cleans up noise, and exports to MP3 or WAV — all in your browser.
Free to try · No credit card required
Related Audio Tools
More free AI audio tools from Notevibes — same engine, no sign-up.
Note Identifier
Sing or play a note and see its name instantly.
Vocal Pitch Monitor
Watch your voice draw a live pitch line across a note grid.
BPM Detector
Find the BPM, key, and Camelot code of any song.
Online Autotune
Pitch-correct a vocal to the classic hard-tune sound.
Audio Pitch Changer
Shift pitch up or down without changing duration.
Voice Recorder
Record audio from your microphone in the browser.
Pitch Detector FAQ
How does the pitch detector work?
It listens through your microphone and measures the fundamental frequency of the sound using autocorrelation — a signal-processing technique that finds the repeating period in the waveform. That frequency is shown in hertz and mapped to the nearest musical note, with a cents meter showing how far sharp or flat you are.
Is anything recorded or uploaded?
No. The microphone signal is analyzed on your own device in real time and discarded frame by frame. No audio is recorded, stored, or sent to any server — the analysis runs entirely in your browser.
What are cents?
A cent is one hundredth of a semitone. The meter shows how far your pitch sits from the center of the nearest note, from 50 cents flat to 50 cents sharp. Within about ±10 cents reads as in tune — most listeners can't hear a difference smaller than that.
Why does the reading jump around or show nothing?
The detector needs one clear pitch at a time. Chords, heavy background noise, very breathy singing, or very quiet input can have no single detectable pitch — move closer to the mic, reduce noise, and hold one steady note.
Does it work for very low and very high notes?
It covers roughly 40 Hz to 2200 Hz — from below a bass guitar's low E to well above a soprano's top notes. Extremely low sub-bass and very high harmonics beyond that range are treated as unpitched.
Is a pitch recognizer or pitch finder something different?
No — pitch detector, pitch recognizer, pitch finder, and pitch checker are all names for the same kind of tool: it hears a sound and tells you its pitch. This one gives you the full readout — frequency, note name, and cents.
Can I use it as a tuner?
Yes — it's the same readout a chromatic tuner gives you: nearest note plus a cents needle, referenced to A4 = 440 Hz. Play one string or key at a time and adjust until the meter reads in tune.
Is it free?
Completely free, with no account and no upload. It runs entirely in your browser — the only thing it asks for is microphone permission, which you can revoke at any time.