Chord Progression Voicing Generator for Guitar Arrangements
Turn progressions like I–V–vi–IV into playable guitar voicing options sorted by position, span, open strings, and difficulty.
Fretboard Lab is a desktop chord voicing workbench for guitarists, teachers, and songwriters who need playable shapes instead of another random chord box. Type a chord or progression, explore positions, compare difficulty, switch tunings, and export diagrams for practice sheets, lessons, charts, or writing sessions.
The problem with ordinary chord charts
Most chord charts answer the smallest possible question: where can I put my fingers for this chord? Real playing asks better questions. Which voicing fits the melody? Which one avoids the bass player's range? Which shape moves cleanly into the next chord? Which option can a student play today? Fretboard Lab is built around those practical choices.
A $19 tool for repeatable arrangement work
The value is not that the app knows a Cmaj7 shape. Free websites already do that. The value is the speed of comparing playable options, filtering by position and difficulty, changing tuning, and exporting clean diagrams without rebuilding the same search every time.
Progressions are about movement
A single chord shape can look fine on its own and fail in a progression. Fretboard Lab helps you compare voicings with the next change in mind: smaller movement, better top notes, easier transitions, and shapes that sound like an arrangement instead of a list of grips.