Desktop Media Downloader
Powered by Tauri + yt-dlp
A compact macOS downloader with a native Rust core, local yt-dlp and FFmpeg for YouTube/Bilibili, and server-assisted parsing for platforms that need relay handling.
Engineered for Desktop Excellence
A practical downloader designed around local reliability: browser cookies where they help, server relay where it is safer, and native progress for long downloads.
macOS ARM64 Stability
Specifically tuned for modern macOS targets. Spawning a compiled Rust core bypasses Electron's V8 CodeRange virtual memory crashes (prevalent on ARM64 macOS machines with 64KB pages).
Local yt-dlp Pipeline
YouTube and Bilibili use bundled yt-dlp locally, with the Rust backend managing queue state, cancellation, progress parsing, speed, and ETA updates.
Clipboard Link Monitor
Includes a background thread loop that monitors the system clipboard. When a video/audio link is copied, a premium toast slides up inside the application so you can download in one click.
Bundled FFmpeg
FFmpeg is bundled for DASH audio/video merging and real audio extraction. Audio-only mode outputs real m4a/mp3/ogg/wav/opus files, not renamed video files.
Cookies, Relay & Proxies
Bilibili tries explicit Chrome profiles such as chrome:Default before other browsers. Remote relay remains available for sites that are more stable server-side, with HTTP proxy support.
Compact Multilingual UI
English, Chinese (中文), and Russian (Русский) are included. The latest UI uses compact task cards, context pills, platform capability tags, and cleaner localized copy.
Decoupled & Clean Architecture
Cobalt Desktop keeps the UI, local download tools, and server-assisted resolver separate so each platform can use the most reliable path:
- Svelte 5 Runes Viewport: A minimal, highly performant Webview layer rendering interactive reactive state without accessing system storage.
- Tauri Rust Core Scheduler: Coordinates local downloads, settings, folder dialogs, clipboard monitoring, progress parsing, and cancellation.
- Local yt-dlp + FFmpeg: Handles YouTube/Bilibili with local browser cookies, DASH merging, and audio extraction.
- Remote Media Service: Handles server-assisted parsing or relay for platforms that are less reliable locally.