What is this tool?

A step-by-step chord progression builder. Pick a key, choose your first chord, and the tool suggests musically natural next chords based on music theory. Emotion filters let you narrow the suggestions to fit the mood you want — bright, melancholic, tense, and more.

When it helps

• Create an original progression

  When you want to build a progression from scratch. You only pick from suggested candidates, so you can make something musical without deep theory knowledge.

• Extend a standard progression

  Start with high-star (standard) transitions, then mix in a 1-star adventurous option to give your progression character.

• Nail a specific mood

  Filter by Bright, Melancholic, Sophisticated, etc., and only suggestions matching that feel will appear.

How to use

1. 1 Pick a key and major/minor from the top bar.
2. 2 Use the emotion filter button to narrow suggestions by mood ("All" shows everything).
3. 3 Tap "Preview" on a candidate card to hear the chord, then "+ Add" to append it.
4. 4 Each added chord has 1/2/4 buttons to set its beat length. Use × to remove a chord.
5. 5 Tap "▶ Play progression" in the dock. Open the settings sheet to adjust BPM and toggle loop.

Related Tools

Related Articles

• Building Chord Progressions — An Emotion-Based Beginner Guide
• Dominant Motion (V→I): The Engine of Chord Progressions