MotionShine01 / Spelling
Bb7 is Bb D F Ab
Each note is named from its place in the chord, so a flat key gets flats and a third is always a kind of third.
Free tool
Chord finder, notes, keys and shapes.
Pick a root and a chord type to see its notes, spelled the way a musician would write them, its intervals, the keys on a piano and the easiest shapes on guitar or ukulele. Click a shape to hear it. Working backwards? Click keys or type notes like C E G Bb and it names the chord, inversions and slash chords included.
Name a chord from its notes
Shapes are worked out for each chord: all its notes, the root lowest on guitar, at most four fingers (a barre counts as one) and four frets of stretch.
Everything runs in your browser, and the sound is made in the page.
Why it is right
Spelled like sheet music.
02 / Shapes
Searched, not copied
Every fret window up to the 12th is checked for shapes that hold all the needed notes and a hand can play; the easiest come first.
03 / Backwards
Notes to a name
Click keys or type notes and it names the chord, with slash chords like C/E when the lowest note is not the root.
Questions
Good to know.
Why does it say A# in one chord and Bb in another?
Because they are written differently in different chords. F# major has A#, and Bb7 has Bb. The finder spells each note from the chord's root, as sheet music does.
What do the x and o above a shape mean?
x: do not play that string. o: play it open. A number like 5fr shows the fret the diagram starts at.
Some 9th and 13th chords skip notes. Why?
On guitar the 5th, and often the 9th or 11th, are left out of big chords because six strings and four fingers cannot hold them all. The notes that give the chord its sound are always there.
Can I hear the chord?
Yes. Click Play on piano, or click any shape to hear it strummed.
What is a slash chord?
A chord with a note other than the root at the bottom, written like C/E: a C chord with E as the lowest note.