Note Identifier Online
What note is this? Sing, hum, whistle, or play it and see the name instantly — with the octave and the matching piano key. A free note finder that runs right in your browser.
Your browser will ask for microphone access — the sound is analyzed on your device and never uploaded.
How to Identify a Musical Note
No file, no theory, no account — just make the sound.
Allow the Microphone
Press Identify my note and allow mic access when the browser asks. Everything runs on your device.
Make One Clear Note
Sing, hum, whistle, or play a single note on your instrument and hold it steady for a moment.
Read the Name
The note's name and octave appear instantly, the matching key lights up on the piano, and a hint shows if you're sharp or flat.
A Note Finder Anyone Can Use
From “what note is this?” to the answer in one breath.
The Note, Instantly
Sing or play and the note name appears the moment the sound starts — with its octave, so you know it's an A3, not just an A.
See It on the Keyboard
The identified note lights up on a piano strip, so you can find the same key on your own instrument at a glance.
Any Sound With a Pitch
Voice, whistle, guitar, piano, violin, saxophone — if it makes one clear note, the identifier names it.
No Music Theory Needed
You don't need to read music or know what a semitone is. Make a sound, read the name — that's the whole tool.
Nothing Is Recorded
The microphone signal is analyzed on your own device and thrown away frame by frame. No audio is stored or uploaded, ever.
Works on Mobile
Runs in the browser on iOS, Android, Chrome, Firefox, Safari, and Edge — your phone's mic is all you need.
Your Voice Never Leaves Your Device
The identifier analyzes the microphone signal on your own device, frame by frame, and discards it. No audio is recorded, stored, or uploaded — 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 Identify Notes For
One answer for every “what note is this?” moment.
Name That Note
A note is stuck in your head — hum it and get its name
Learn Songs by Ear
Pick out a riff note by note and write the names down
Find Your Vocal Range
Sing your lowest and highest notes to learn where your voice sits
Match a Key on Piano
Identify a note, then find the lit key on your own keyboard
Music Class Helper
Let students check their own notes during practice
Transcribe a Melody
Hum a tune phrase by phrase to work out its notes
“What Note Is This?” — Now You Can Just Ask
A melody is stuck in your head. A string on the guitar sounds right but you can’t name it. You’re mid-phrase wondering “what note am I singing?” and there’s no teacher around to tell you. Naming notes by ear takes years of training — this note identifier does it instantly instead. Make the sound, and the name appears: not just “A”, but “A3”, with the matching key lit up on a piano so you can find it on a real instrument.
Names, octaves, and the piano strip
Musical notes repeat: every eighth white key on a piano is another C, higher or lower. That’s why the identifier shows an octave number with the name — C4 is middle C, A4 is the A above it, and a bass singer’s A2 is two octaves below a soprano’s A4. The piano strip makes it concrete: whichever note you make, its key lights up, so “F♯” stops being an abstract label and becomes a specific black key you can press.
One note at a time — that’s the trick
A note detector works on a single clear pitch. Hold a steady vowel, whistle a tone, pluck one string, press one key — any of those lock in immediately. What it can’t name is several notes at once: a strummed chord or a full song playing in the room has many pitches stacked together. For a whole song, ask a different question — its key — and the BPM & key detector reads that straight from the file.
Private, instant, and free
The whole analysis runs in your browser: the mic signal is examined frame by frame on your own device and thrown away. Nothing is recorded or uploaded, there’s no account, and the answer is instant — which matters when you’re picking out a melody note by note and asking the question thirty times in a row.
When you want more than the name
If you want the numbers behind the name — the exact frequency in hertz and a tuner-style cents meter — the pitch detector is the same engine with the full readout, and the vocal pitch monitor draws your singing as a line over time. And once you know your notes, the toolkit helps you use them: tune a recorded vocal with online autotune, move a song into your range with the pitch changer, or record yourself properly with the voice recorder.
Know the Note? Now Make Music With It
The full Notevibes Online Audio Editor records, tunes vocals, shifts pitch, detects key and tempo, 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.
Pitch Detector
Read the live pitch of any sound — Hz, note, and cents.
Vocal Pitch Monitor
Watch your voice draw a live pitch line across a note grid.
Online Autotune
Pitch-correct a vocal to the classic hard-tune sound.
BPM Detector
Find the BPM, key, and Camelot code of any song.
Audio Pitch Changer
Shift pitch up or down without changing duration.
Voice Recorder
Record audio from your microphone in the browser.
Note Identifier FAQ
How does the note identifier work?
It listens through your microphone, finds the fundamental frequency of the sound, and matches it to the nearest note of the musical scale. The note's name and octave appear on screen and the matching key lights up on the piano strip — all in real time.
What can it identify?
Any sound with one clear pitch: singing, humming, whistling, and single notes on instruments like guitar, piano, violin, flute, or brass. Chords and full songs have many notes at once — for a whole song's key, use the BPM & key detector instead.
Can it tell me what note I'm singing?
Yes — that's the most common use. Sing or hum into the mic and the note you're singing appears live, with its octave. Hold it and watch the sharp/flat hint to see how steady you are, or slide from your lowest note to your highest to map your vocal range.
Is anything recorded or uploaded?
No. The microphone signal is analyzed on your own device and discarded frame by frame. Nothing is recorded, stored, or sent to a server — and the mic switches off the moment you press Stop.
What do the octave numbers mean?
Notes repeat up and down the keyboard, so the number pins down which one you mean: C4 is middle C, A4 is the A above it (440 Hz), and each octave up doubles the frequency. Two people can both sing an A and be an octave apart — the number tells you which A.
What does 'sharp' or 'flat' next to the note mean?
It shows how close you are to the exact center of the note, measured in cents (hundredths of a semitone). A few cents off is normal and inaudible; 30–40 cents off means you're drifting toward the next note.
Why doesn't it show a note sometimes?
The identifier needs one steady pitch. Background noise, chords, very quiet input, or breathy unpitched sounds have no single note to name — move closer to the mic and hold one clear tone.
Is it free?
Completely free — no account, no upload, no limits. It runs entirely in your browser and only asks for microphone permission, which you can revoke at any time.