a melody grid based on Chrome Music Lab's Melody Maker — place notes, add a harmony echo, play.
split, combine, convert, edit, and annotate PDFs — entirely on your device, nothing uploaded.
generate QR codes for URLs, text, WiFi, contacts, email, and phone numbers.
play chess in your browser — local pass-and-play, vs a built-in AI, or live against another oeper.dev user.