Read labels like C4, F#4, or Bb4.
Identify notes
Piano note identifier
A piano note identifier helps connect each key to its note name, octave, MIDI number, and frequency. Use it when you know where a key is but need the exact label.
C3D3E3F3G3A3B3C4D4E4F4G4A4B4C5
C#3 / Db3D#3 / Eb3F#3 / Gb3G#3 / Ab3A#3 / Bb3C#4 / Db4D#4 / Eb4F#4 / Gb4G#4 / Ab4A#4 / Bb4Use MIDI numbers for software and digital music tools.
Use frequency values for tuning and pitch reference.
Identifier versus detector
This guide explains the label system. The interactive detector page lets you click a key and read its exact note data immediately.
When to use note identification
Use note identification when reading diagrams, checking chord notes, building MIDI files, or comparing frequencies.
How to confirm the note
Locate the white-key anchor, check whether the selected key is black or white, then confirm the octave number.
Identifier fields
| Field | Example | Meaning |
|---|---|---|
| Note | C4 | Letter name plus octave |
| MIDI | 60 | Digital note number |
| Frequency | 261.63 Hz | Pitch at standard tuning |
FAQ
Quick answers
Can this site identify a clicked piano key?
Yes. The piano note detector page identifies clicked keys in the browser without microphone access.
Can it identify recorded audio?
No. The current identifier is click-based and does not upload or record audio.
What data does a note identifier show?
It can show note name, octave, MIDI number, and frequency.