Tool Directory
Chords, Melody, Rhythm.
Learn music theory by topic.
Interactive tools organized by topic — all free, all in the browser, no install needed.
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Learn Chords
Chord structure, diatonic chords, and progressions. Hear everything as you learn.
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Learn Melody
Scales, intervals, and modes. Build the ear and knowledge you need for melody.
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Train Your Rhythm
Lock in tempo with the metronome and sharpen your rhythm sense with ear training.
Diatonic Chord Reference
Choose a key and see its diatonic chords instantly. Compare triads and seventh chords by ear, then use them for songwriting or progression practice.
Chord Finder
Look up chord tones by name, or tap notes on the keyboard to identify a chord.
Chord Diagram
Look up guitar chord shapes as diagrams. Tap any chord to hear it.
Chord Progression Player
Play classic progressions like Pachelbel's Canon, the Royal Road, the blues, and II-V-I. Change key and tempo to hear how the same pattern moves.
Chord Progression Builder
Build your own chord progressions one chord at a time, guided by emotion.
Progression Generator
Pick a key and a mood, then generate a musically coherent chord progression and play it back instantly.
Melody Note Guide
See which notes fit over any chord, with chord tones and scale tones highlighted on a piano.
Step Sequencer
Build your own melodies by arranging scale notes on a step grid. Tap the grid to toggle notes, then loop-play your pattern at any tempo.
Scale Dictionary
Explore major, minor, pentatonic, Japanese, and world scales on piano or guitar. Hear each scale and see the notes before using them in melodies.
Mode Dictionary
Learn the 7 church modes with keyboard visuals and audio. Free browser mode dictionary — explore Dorian, Phrygian, Lydian, and more.
Circle of Fifths
Tap the circle of fifths to hear key relationships, accidentals, and V-I movement. A visual way to understand keys, modulation, and progressions.
Interval Calculator
Select two notes to instantly see the interval name, semitone count, and consonance level.
Ear Training
Practice identifying intervals and chord qualities by ear. Short quizzes build the listening skills behind ear-copying, arranging, and improvising.
Scale Converter
Hear a familiar public-domain melody in another scale, from Ryukyu to whole tone. A quick way to feel how scales change mood and color.
Rhythm Pattern Dictionary
See and hear classic grooves: rock, funk, bossa nova, swing, reggae, and waltz, on a visual step grid with playback.
Rhythm Ear Training
Listen to a rhythm pattern and identify the genre. Practice distinguishing rock, funk, bossa nova, swing, and more. Free browser quiz.
Metronome
Set BPM, time signature, and accent patterns for focused practice. Includes tap tempo, so you can measure a song and start practicing right away.
Tap Tempo
Tap along with a song to estimate its BPM, watch the average settle, then open the metronome at that tempo for practice.
Transpose Tool
Transpose chord progressions into a new key, then play the before and after versions. Useful for singers, instruments, and quick arrangement checks.
Key Finder
Enter the chords from a song to estimate likely keys and see match strength. A practical starting point for ear-copying and progression analysis.
Chord Progression Analyzer
Enter a chord progression to see its key and how each chord works as tonic, subdominant, or dominant.