Chord and Instrument Tools
Look up chords, generate progressions, and connect music theory to playable piano and guitar shapes.
Frequently asked questions
What is the most common chord progression?
The I–V–vi–IV progression is arguably the most common in Western pop. In C major the chords are C–G–Am–F. Thousands of hit songs use this pattern.
How do I tune my guitar without a tuner app?
Use the online guitar tuner above — it listens through your microphone and shows how sharp or flat each string is. No app download required.