Used for choosing which scale bank your chords save into.
Chord Memory
Store up to 12 chords with their scale. Slots update when you transpose.
Backup & Share
Backup your chord banks to a file or restore from a previous backup.
Help
Learn about controls and features.
Chord Memory
Save chord
Select notes on the keyboard, choose a scale, then tap a slot.
Scale
Scales save locally on this device.
Slot actions
Load a chord to practice it, then transpose to move it through keys.
Name this chord
Alternate Chord Suggestions
Similar chords and voicings you can try:
How to Use Piano Chord Transposer
🎹 Piano Keyboard
Tap keys to select notes. Selected keys light up in green.
Use − / + buttons to change the number of visible octaves.
🎵 Transposing
Select notes, then use ▲ (up) or ▼ (down) to transpose by semitone.
Your selected notes move together while staying in the keyboard range.
≈ Alternate Chords
Select a chord and tap ≈ to see suggestions:
• Inversions (1st, 2nd)
• Extensions (7th, 9th, 11th)
• Suspended chords (sus2, sus4)
• Relative major/minor
Tap Apply to use any suggestion. The ↶ button appears to undo (up to 5 steps).
💾 Chord Memory
12 scale banks (C through B), each with 12 chord slots.
• Use bank arrows ◀ ▶ to switch between scales
• Tap a slot to save the current chord
• Tap again to load a saved chord
• Open Menu → Chord Memory to manage slots
💾 Backup & Share
Export Data: Download all your chord banks as a JSON file
• Backs up all 12 scale banks with saved chords
• Save to cloud storage or share with others
Import Data: Restore from a previous backup
• Select a previously exported JSON file
• Replaces current data (backup first!)
• Perfect for syncing across devices
⚡ Quick Tips
• Tap Clear to deselect all notes
• The app auto-detects and names chords
• Custom name chords when saving to memory
• Works offline when installed as a PWA
• All data saved locally on your device