Pitch Detector – Find the Note of Any Sound
Microphone tunerReady
- Quiet room, one string at a time
- Tune up to the note
- ±5 cents counts as in tune
- Runs inside your browser
- No upload, no account
- Nothing saved after you close
Online pitch detector for voice and instruments
This online pitch detector shows the note and frequency of any sound. Find the pitch of your voice, an instrument or any tonal sound. Great for singers and checking reference tones.
Note finder
The detector maps frequency to the nearest equal-tempered note, so it doubles as a note finder for songs.
Vocal range
Bass E2–E4, baritone A2–A4, tenor C3–C5, alto F3–F5, mezzo A3–A5, soprano C4–C6.
How detection works
We use an autocorrelation (YIN-style) method on 4096-sample blocks, accurate to about one cent on clean tones.
How to Use the
Pitch Detector
- 01
Allow
press Start and allow the microphone.
- 02
Sound
sing or play a steady note.
- 03
Read
frequency and note name appear.
- 04
Explore
try your lowest and highest notes to find your range.
Note finder
The detector maps frequency to the nearest equal-tempered note, so it doubles as a note finder for songs.
Vocal range
Bass E2–E4, baritone A2–A4, tenor C3–C5, alto F3–F5, mezzo A3–A5, soprano C4–C6.
How detection works
We use an autocorrelation (YIN-style) method on 4096-sample blocks, accurate to about one cent on clean tones.
Getting started
Detect pitch in three steps
Allow the mic, sing or play steadily, read the note.
Arrow not moving?
The sound may be too quiet or noisy; get closer.
What note is this? Reading the detector
The large label shows the nearest note and octave (A4 is the A above middle C). The frequency in Hz is what the microphone actually measured, and cents show how far you are from that note: 100 cents make a semitone, so −20 means slightly flat and +20 slightly sharp. Within about ±5 cents most listeners hear it as in tune.
Getting a stable reading
- Hold one steady note; sliding, vibrato and chords make the reading jump.
- Sing a clear vowel such as "ah" rather than a hum.
- Keep 20–50 cm from the mic in a quiet room.
- Low notes need a moment longer to measure because each cycle takes longer.
Uses
Find what note you are singing, identify a note in a song, check an instrument without a dedicated tuner, or work out your vocal range. See what note am I singing.
Using the pitch detector on Android and Windows
On Android, open this page in Chrome, tap Allow when it asks for the microphone and keep the phone 20–50 cm from your voice or instrument. On a Windows laptop, choose the right microphone in the browser prompt; built-in laptop mics work well for singing and guitar in a quiet room. If the reading stays empty, check the microphone permission in the address bar.
Related guides and fixes
Learn more in these guides: How to tune a guitar, What note am I singing, Microphone not working.
Frequently Asked Questions
Q.Why does it show nothing?
Sound is too quiet or not tonal.
Q.Is it accurate?
On steady notes, within a few cents.
Q.Can it detect chords?
No, one note at a time.
Q.Why does the note jump to the octave above or below?
Strong harmonics can fool any pitch detector for a moment. Play or sing more softly and steadily, and it settles on the fundamental.