Free pitch detector

What note am I singing?

Sing or play any note and see it instantly — the note name, its frequency in Hz, and exactly how many cents sharp or flat you are. Free, in your browser, nothing uploaded.

♪ Tap the mic, then sing or play any single note.

– Hz

🔒 Analysis runs entirely in your browser — your audio is never recorded or uploaded.

How to use the pitch detector

1. Allow the mic

Tap the mic button and allow microphone access. A quiet room gives the cleanest reading.

2. Hold one note

Sing a steady “ahh” or play a single note. Short or breathy notes are harder to read.

3. Read the meter

The big label is your note. The needle shows cents — inside the green zone means you’re in tune.

What the readings mean

The note name (like A3 or C#4) is the closest note in standard tuning (A4 = 440 Hz). The frequency is the actual pitch your voice produced. The cents meter shows how far you are from the exact note — a cent is 1/100 of a semitone, and staying within about ±10 cents sounds “in tune” to most listeners.

If the needle sits consistently flat on sustained notes, it’s usually a breath-support issue rather than a hearing issue — our breath control guide covers the fixes. If you’re unsure whether you’re generally on pitch when singing songs, take the “Am I singing on pitch?” check or run a full vocal range test to find where your voice sits.

From one note to your whole voice

A pitch detector tells you about a single note. The Singing Coach AI app listens to you sing entire songs and scores pitch accuracy note by note — along with breath, tone, timing and 22 other dimensions — then gives you drills matched to what it hears. It’s the difference between a tuner and a coach.

Analyze my singing free See how it works

Pitch detector FAQ

How accurate is this pitch detector?

It uses autocorrelation pitch tracking, accurate to within a few cents for clear, sustained tones between roughly C2 and C6. Background noise, very breathy singing or very short notes reduce accuracy — hold each note steady for the best reading.

Does it work for instruments as well as voice?

Yes. It detects any clear single pitch, so you can use it to check a guitar string, a piano note, a wind instrument, or your singing voice. It reads one note at a time — chords aren’t supported.

Is my audio recorded or uploaded?

No. The analysis runs entirely in your browser using the Web Audio API. Nothing is recorded, stored, or sent to any server.

What does “cents sharp or flat” mean?

A cent is 1/100 of a semitone. Within about ±10 cents of the target note, most listeners hear you as in tune. Consistently reading sharp or flat by more than 20 cents is a sign to slow down and practice pitch matching.

Keep learning

Vocal range test How to sing in tune Am I singing on pitch? Browse all guides