Music tools
Chord finder
Pick a root and chord type to see its notes, intervals, and a piano diagram, then play it back. Everything runs in your browser.
How it works
Choose a root note and a chord type and the finder shows the chord's notes, the intervals that make it up, and a piano diagram with those notes highlighted - then you can play it to hear how it sounds. It covers triads (major, minor, diminished, augmented, suspended), sixths and sevenths, and richer extensions like ninths and added-ninth chords, each spelled correctly for the root you pick.
It is a quick reference when you meet an unfamiliar chord symbol, when you are voicing a chord on the piano, or when you want to hear the difference between, say, a major seventh and a dominant seventh. The notes are worked out and the sound is synthesized in your browser, so nothing is uploaded.
Example. Pick C and "Major 7th" and the finder shows C - E - G - B (root, major third, perfect fifth, major seventh) lit on the keyboard. Press play to hear it, then switch to "Dominant 7th" to hear B drop to Bb.
FAQ
Which chords can I look up?
Major, minor, diminished, and augmented triads, suspended (sus2 and sus4) chords, sixths, dominant, major, minor, half-diminished, and diminished sevenths, the minor-major seventh, and ninth, major-ninth, minor-ninth, and add-nine chords.
How are the chord notes spelled?
By stacking thirds so each chord tone lands on the correct letter - a C major chord is C E G, and a C# minor chord is C# E G#, not Db F Ab. That keeps the spelling consistent with how the chord is written.
Can I hear the chord?
Yes. A play button synthesizes the chord with the Web Audio API so you can hear it as a block or rolled. Browsers need a click before audio starts, which the play button provides.
Is any audio uploaded?
No. The chord notes are computed and the sound is generated entirely in your browser. Nothing is recorded or sent to a server.