Pitch Detector
Sing or play into your mic. See the exact note, frequency, and tuning accuracy on a live piano keyboard. Free online pitch detector β no download, no signup required.
Free Online Pitch Detector β Find Any Musical Note Instantly
Click Start to begin detecting pitch
C2
C3
C4
C5
C6
What Is a Pitch Detector?
Real-Time Note Recognition for Voice and Instruments
A pitch detector is a tool that listens to your voice or instrument through the microphone and identifies the exact musical note you are producing. Our free online pitch detector shows the note name, octave, frequency in Hz, and how many cents sharp or flat you are β all updating live. It works entirely in your browser with no software to install. Click Start, allow mic access, and every note appears instantly on an interactive piano keyboard. Whether you are warming up before a performance, running intonation drills, or checking instrument tuning, you get accurate data in under a second. Over 50,000 musicians use online pitch detector tools like this every month to improve their accuracy.
Live Note Display
Shows the note name and octave (like A4 or C3) the moment you produce a sound. No delay, no lag.
Cents Accuracy Meter
See exactly how many cents sharp or flat each note is. Color-coded feedback tells you: green for in-tune, yellow for close, red for off.
Piano Keyboard Visualization
Every detected note lights up on a full piano layout from C2 to C6. Your voice is mapped onto the keyboard in real time.
Frequency Readout in Hz
Displays the precise Hz value of each note. Useful for tuning instruments to concert pitch at A4 = 440 Hz or alternate reference tunings.
Pitch History Chart
A scrolling timeline from the pitch detector tracks your notes over time. Spot wobble, consistency, and improvement across entire practice sessions.
Works With Any Sound Source
Vocals, guitar, violin, piano, flute, ukulele β the pitch detector handles any instrument or voice that produces a clear fundamental tone.
For Singers & Musicians
Pitch Detector for Vocal Practice
Train your ear and voice with real-time feedback
Singers use the pitch detector to check whether they hit target notes accurately. Instead of guessing if you are flat on that high note, the pitch detector shows it on screen β note name, cents deviation, and keyboard position. Run it during warm-ups to check intonation before rehearsals. Use it while learning new songs to confirm you match the melody note by note. Over time, consistent practice builds muscle memory for more accurate singing.
For Teachers & Students
Pitch Detector for Music Education
Teach pitch accuracy with visual feedback
Music teachers use the pitch detector as a classroom tool for ear training and intonation exercises. Students sing a target note and the pitch detector shows whether they hit it, went sharp, or went flat. This instant visual feedback makes abstract concepts like being 15 cents flat concrete and fixable. Students adjust in real time, turning intonation from guesswork into a measurable, improvable skill.
How to Use the Pitch Detector
Get Started in Four Steps
1
Open the Pitch Detector
Click the Start button above. Your browser asks for microphone permission β allow it so the tool can hear your voice or instrument.
2
Sing or Play a Note
Produce any sound into your microphone. The pitch detector picks up the fundamental frequency and identifies the note instantly.
3
Read the Results
See the note name, octave, Hz frequency, and cents deviation on screen. The piano keyboard highlights your current note in real time.
4
Review Your Pitch History
A scrolling timeline records your session. Spot patterns in your intonation and track improvement over time.
Pitch Detector FAQ
Common Questions About the Pitch Detector
Yes. The pitch detector runs entirely in your browser using the Web Audio API. There is no subscription, no paywall, and no download required. You can use it as many times as you want, forever, at zero cost.
The pitch detector detects frequency within plus or minus 1 cent accuracy, which is one hundredth of a semitone. That is precise enough for professional instrument tuning, vocal coaching, and studio reference work.
Yes. It works on Chrome and Safari on both Android and iOS devices. Allow microphone access when prompted and the interface adjusts to smaller screens automatically.
Any instrument that produces a clear fundamental tone β guitar, violin, flute, piano, ukulele, trumpet, cello, and more. It also works as a vocal pitch monitor for singers checking their intonation.
No. The pitch detector processes all audio locally in your browser. Nothing is sent to any server. Your audio data stays on your device and is discarded the moment you close or refresh the page.
Start Using the Pitch Detector Now
Check your pitch, tune your instrument, or practice intonation β all free in your browser. Open the pitch detector and hear the difference.