OTape

oTAPE is an open file format that preserves the cassette tape experience by storing a complete tape—including both sides, audio, artwork, and metadata—in a single self-contained .otape file. The format intentionally enforces cassette constraints like fixed length, sequential playback without seeking, and manual rewinding between sides, while using standard technologies (ZIP, JSON, AAC audio) to remain accessible and offline-compatible. A web-based player demonstrates the format, allowing users to load and play oTAPE files entirely in their browser without uploading data to any server.