Piano Chord Finder

A piano chord identifier names the chord under your fingers the moment you play it. Press C, E and G on a MIDI keyboard and the screen says C major. Add a B♭ and it says C7. That is the whole job, and Chordzy does it in the browser or in the downloadable app.

The reason to want a piano chord finder is momentum. Stopping to work out what you just played is how a practice session turns into stopping and checking, and the playing that comes out of that is the monotonous, robotic kind. With the name on screen as you play you can test a chord, a voicing or a whole progression without taking your hands off the keys.

Chordzy shows the chord name and the notation together, in real time, which is what makes it a piano chord lookup you leave running rather than a reference you visit. Click the image above to launch it.

A chord finder piano tool reads the notes you are holding down and names the chord they imply. C–E–G is C major. C–E–G–B♭ is C7. Play the same notes in a different order, E–G–C say, and it still says C major, because an inversion changes the voicing and not the chord.

That is worth having because chord names are how harmony is talked about everywhere else. Knowing them is a practical skill and it improves four things:

• reading and understanding harmony in sheet music
• improvising and composing
• accompanying singers and other instruments
• playing in any key with your eyes off the keyboard

A reliable piano chord identifier takes the second-guessing out. What is left is the playing.

Chordzy is a chords finder piano built for practice rather than for looking things up. Plug in a MIDI keyboard and the chord name follows your fingers, with the notation drawn beside it. Guess wrong and you hear it, read the name, and move one note.

The browser version needs no install; Chrome, Edge and Opera can read a MIDI keyboard, Safari cannot, so on a Mac use one of the first three. The downloadable app does the same job with the same keyboard, and works offline.

A chord is not one shape. C major can be played three ways:

• root position (C–E–G)
• 1st inversion (E–G–C)
• 2nd inversion (G–C–E)

A chord finder piano tool shows the same name for all three, which is the point: the identity stays put while the voicing moves. Play the three in a row and listen. Root position sits still. The inversions lean, each in its own direction, and the one that leans is the one you reach for when the next chord is a step away and you do not want the hand to jump.

Used this way the piano chord identifier stops being a labeler. It becomes the thing that ties what you know about the chord to what your hand does with it.

A piano chord lookup tool is at its most useful when it checks your ear rather than replacing it. A routine that does that:

1. Play a chord and do not look yet.
2. Ask yourself: major or minor? stable or tense?
3. Sing the top note, then the root (even if you are not sure).
4. Check the chord name from the piano chord finder.
5. Correct one note at a time and listen to what changes.

Do that for a few minutes a day and the differences start arriving before the name does: maj7 from dominant 7, sus2 from add9, without having to "think" about it.

Chord names make the most sense inside real music. Play from online notation with the names showing and the patterns stand out on the page. Cadences. Sequences. Modulations. The common progressions like I–V–vi–IV, which a startling number of songs share.

To do that here, click on the sheet music to open it in Chordzy and play along. The chord names appear as you play, so the staff, your hands and your ears are all looking at the same chord at the same moment.

Keep it short and repeat it.

Start in one key (C is fine) and cycle I–IV–V–I in root position. Repeat it with inversions, so the right hand moves as little as possible from one chord to the next. Then add 7ths and listen to how the extra note changes the pull towards the next chord.

Then take the same plan to a new key. That is where a chords finder piano setup earns its keep: you move fast, confirm at once, and never get stuck on a theory detail with your hands in the air.

When you want to make it musical straight away, click on the sheet music and let Chordzy name the chords as you play them. The "robotic" feeling goes as the harmony gets surer, and it does not come back.