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Free Pitch Detector Online
An online pitch detector identifies the musical note, frequency, and tuning distance of a steady sound. Use your microphone to see whether a voice or instrument is flat, sharp, or in tune without recording or uploading audio.
Live tuner
Listen for a note
Detected note
Play or sing one steady note
Ready. Microphone access begins only after you start listening.
How to use the pitch detector
- 1Select Start listening and allow microphone access when your browser asks.
- 2Play or sing one steady note near the microphone.
- 3Read the detected note, frequency, and flat or sharp cents value.
- 4Adjust the note until the marker sits near the center and reads In tune.
Pitch detector questions
What is an online pitch detector?
An online pitch detector listens to a steady sound and identifies its nearest musical note, frequency in hertz, and tuning distance in cents.
Does ChatSpark record or upload my microphone audio?
No. Audio is analyzed in real time inside your browser. It is not recorded, saved, or sent to ChatSpark.
How do I get a stable pitch reading?
Hold one clear note near the microphone, reduce background noise, and avoid vibrato for a moment. A sustained tone gives the detector enough cycles to measure accurately.
What do cents sharp and flat mean?
One semitone equals 100 cents. A negative value is flat, a positive value is sharp, and a reading within about five cents is generally considered in tune.
Why would I change the A4 reference pitch?
Most modern music uses A4 = 440 Hz, but some orchestras and historical performances tune slightly higher or lower. Match the reference used by your group or recording.
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