Open—Shape

Open—Shape is a free tool for guitarists to explore and build chord progressions. It functions as a chord finder that provides voicings for standard and alternate tunings, including DADGAD, Open G, and drop tunings. The platform includes a microphone-based tuner and allows users to save, play back, and share their progressions. What makes it different: most chord tools only work in standard tuning. Open—Shape searches real voicings across 33 built-in tunings plus any custom tuning you define, so a DADGAD or Drop C progression sounds exactly as it would on a real guitar — not a generic transposition. It also includes a built-in mic tuner, so you can get your guitar into that tuning before you play. A guitarist stuck on a song in an unfamiliar tuning can go from "what chord is this even" to a full playable progression in minutes.