Chords, scales & harmony

Understand what you play.
See it, hear it, learn it.

Play on the interactive piano or guitar — or connect a MIDI keyboard — to identify chords and intervals, explore scales, and understand harmony visually.

Open web app See how it works
Free, no account, no installation, and no ads.
Made for music students teachers piano & MIDI players guitarists
🌐 English / Español
Try it now →
Apps

Use it wherever you practise

🌐
Web App
The full tool suite in your browser — no installation required. Detect chords and intervals, generate piano and guitar chords, interactive circle of fifths, scales, and metronome. MIDI keyboard optional.
Open →
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Mobile App
Take FreeMIDIChords anywhere. Same chord tools and circle of fifths, optimized for touch on iPhone, iPad and Android.
iOS App Store Google Play
💻
Desktop App
A native desktop experience for Mac, Windows and Linux. Full chord and scale toolkit with MIDI input, audio engine, and staff notation — no browser needed.
Mac App Store Windows (Microsoft Store) Linux (.deb)
🎹
PianoPilot
Roland FP-30X
A related desktop app for Roland FP-30X owners. Manage supported piano settings, tones, keyboard modes, presets, and the metronome over USB MIDI or Bluetooth MIDI.
Learn more →
Screenshots

See it in action

Ready to play?

The web app works right now in your browser — no account, no download, no ads.

Open FreeMIDIChords →
💛

Support the project

This project is designed to stay free and ad-free forever. Your support helps cover development, maintenance, infrastructure, and support time.

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💬

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Have a suggestion or found a bug? We read every message and use it to keep improving.