yViewer is a fast, local-first desktop viewer for 50+ file formats. Instantly open PDFs, Office documents, PSD and RAW images, videos, audio, archives, 3D models, SQLite databases, HDF5 files, code, and large logs—all in one app. Go beyond previewing with PDF annotations, PSD layer inspection, image and audio editing, full-folder search, hierarchical tags, playlists, and an interactive knowledge graph. Built with Tauri, Rust, and React for Windows, macOS, and Linux.