Virtual piano
Play with touch, a mouse or your computer keyboard. Chords, octave shift and sustain.
Music theory tools
Things to play with rather than read. Each one works in the browser, makes a sound when you ask it to, and spells every note the way a musician would write it. No account, nothing to install.
Want the explanation first? Learn explains the concepts, and Reference has a page for every scale, key, chord and interval.
Free interactive tools
Scale explorer
Any major, minor or pentatonic scale on any note, on the staff and keyboard.
Mode explorer
The seven modes on any tonic, with the note that makes each one distinct.
Interval explorer
Every interval inside an octave, from any note, counted and playable.
Chord explorer
Triads, sevenths, sus and add chords on any root, spelled and playable.
Circle of fifths
Choose a key to see its signature, relative minor and neighbours.
Note finder
Touch a staff note to find its key, or a key to find its note. Both clefs.
Time signature player
Hear 2/4, 3/4, 4/4, 6/8 and 9/8 and where their strong beats land.
Analyse your own music
The analysis itself is free. A longer written explanation of your progression is an optional one-off purchase.
Chord progression analyzer
Paste chords to get the key, Roman numerals and cadences. Optional written report.