In simple English
This is a free video editor that runs entirely on your own computer. It lets you cut clips, add titles, create automated subtitles, and remove backgrounds without uploading your files anywhere. You do not need an account, a subscription, or an internet connection to use it. It is free to download and use, but video editing requires a capable graphics card and computer memory.
What it is
Concat is a cross-platform video editing application powered by Rust and FFmpeg. It includes local AI models for speech recognition, voice cloning, and background removal, alongside a built-in MCP server for AI coding agents.
What it is good for
Solo creators making TikToks, YouTube Shorts, or tutorials who want professional editing features without monthly subscription fees or cloud uploads.
- Completely free with no watermarks, subscriptions, or required user accounts.
- Runs entirely offline with local AI models for auto-captions and voice synthesis.
- Includes automation hooks via a JSON-RPC API and an MCP server for AI agents.
- Distribution builds are currently unsigned and require manual security bypasses on Windows and macOS.
- AI features and 4K video editing demand substantial RAM and a modern graphics card.
- Distributed under the copyleft AGPL-3.0 licence, which has strict rules for network services.
CapCut
FFmpeg
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cd src cargo run -p concat