About
Random chord ideas for writing and practice.
RNG Chords is a free browser-based chord progression generator by Jonathan R. Reed. It is built for guitarists, pianists, songwriters, and producers who want quick harmonic prompts that can be heard, edited, saved into idea slots, and exported as MIDI.
The generator keeps the workflow direct: roll a progression, lock the chords that work, reroll the rest, preview the sound, and bring the selected ideas into a writing session.
The app is meant for early composition work. Instead of searching through theory charts or guessing at the next chord, a player can generate a small set of usable options, keep the strongest choices, and hear how the loop works on guitar, piano, or a production track.
RNG Chords also works as a practice prompt. A musician can roll a key, try the progression by ear, transpose it, or export the MIDI into a DAW for arranging. The goal is not to replace theory or taste. It is to remove setup friction so the writer can make musical decisions sooner.
Each roll can be accepted, changed, or ignored. That keeps the tool lightweight enough for a browser tab while still covering common needs: a verse loop, a bridge change, a practice cycle, a backing track, or a harmonic sketch before recording.
The interface avoids accounts and projects so the app can stay focused on a single job. Open it, roll a few possibilities, keep the strongest chords, and move the idea into the instrument or software where the song is actually being written.
That makes RNG Chords suitable for short practice breaks, longer writing sessions, and quick experiments when a track needs another harmonic option.
It is intentionally scoped to chord generation, playback, locking, rerolling, and export so the page remains focused on composition instead of account or project management.