Music Theory Tools
Interactive music theory tools for students, teachers, and curious musicians. Explore the Circle of Fifths with clickable key segments showing key signatures, relative majors/minors, and diatonic chords. The Scale Finder displays 15+ scale types on a piano keyboard visualization with interval formulas and related chords. The Chord Finder identifies chords from selected notes on an interactive keyboard, showing root, quality, inversions, and formulas. The Interval Ear Trainer plays two notes and tests your ability to identify the interval, with difficulty modes, score tracking, and reference song hints. All theory tools include audio playback via Web Audio API.
4 tools available
What You'll Find
This collection includes Circle of Fifths for interactive circle of fifths diagram — click any key to see chords, key signatures, and relative major/minor, Scale Finder for find any musical scale by root note and type — see notes, intervals, and a piano visualization with audio playback, Chord Finder for click notes on a piano to identify any chord — shows chord name, quality, inversions, and intervals, Interval Ear Trainer for train your ear to recognize musical intervals — hear two notes and identify the interval with score tracking. Each tool is designed to save you time and deliver professional results right from your browser.
When to Use Each Tool
Common Workflows
These music theory tools work well together. Start with Circle of Fifths to interactive circle of fifths diagram — click any key to see chords, key signatures, and relative major/minor, then use Scale Finder to find any musical scale by root note and type — see notes, intervals, and a piano visualization with audio playback. Combine with Chord Finder to round out your workflow and cover all your music theory needs.
Circle of Fifths
Interactive circle of fifths diagram — click any key to see chords, key signatures, and relative major/minor.
Scale Finder
Find any musical scale by root note and type — see notes, intervals, and a piano visualization with audio playback.
Chord Finder
Click notes on a piano to identify any chord — shows chord name, quality, inversions, and intervals.
Interval Ear Trainer
Train your ear to recognize musical intervals — hear two notes and identify the interval with score tracking.
Frequently Asked Questions
How many scales does the Scale Finder include?
The Scale Finder includes 15+ scale types: Major, Natural Minor, Harmonic Minor, Melodic Minor, Pentatonic Major, Pentatonic Minor, Blues, Dorian, Phrygian, Lydian, Mixolydian, Locrian, Whole Tone, and Chromatic — covering Western music theory comprehensively.
Is the ear trainer suitable for beginners?
Yes — the Interval Ear Trainer includes three difficulty modes. Easy mode focuses on perfect intervals (P4, P5, octave), medium adds thirds and sixths, and hard includes all 13 intervals. Reference song hints help beginners associate each interval with a familiar melody.
Can I hear the scales and chords?
Yes, all theory tools include audio playback using the Web Audio API. Click any key on the Circle of Fifths to hear the root and triad, play scales ascending and descending in the Scale Finder, and hear selected notes in the Chord Finder.
Related Resources
Explore more tools in the Music section, or browse all categories below.