jub0t/concat

Concat: The truly free, and open-source cross-platform CapCut replacement. Supports MCPs & API.

What it solves

Concat is a free, open-source alternative to CapCut that provides professional video editing tools without watermarks, accounts, subscriptions, or the need to upload footage to the cloud. It focuses on providing a local-first approach to video editing, ensuring that user data and footage never leave the disk.

How it works

The software is built on a native Rust engine with a GPU compositor for high-performance 4K scrubbing and hardware decoding. It integrates local AI models for specific tasks—such as Whisper for auto-captions, voice cloning, and background removal—which are downloaded once and run entirely offline.

Who it’s for

It is designed for creators of short-form content (TikTok, Reels, Shorts), YouTubers, tutorial makers, and podcast clip editors who want a powerful, private, and free tool for video editing.

Highlights

  • 100% Local AI: Auto-captions via local Whisper, text-to-speech, and voice cloning run offline.
  • Advanced Editing Tools: Includes keyframe animation with a curve editor, multi-track timelines, and over 170 effects and transitions.
  • Scriptable Interface: Provides JSON-RPC, gRPC, and MCP APIs, allowing AI agents and scripts to automate video cutting.
  • Cross-Platform: Works across macOS, Windows, Linux, and Android.
  • High Performance: Native Rust engine with GPU acceleration for smooth 4K export and scrubbing.

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