Concat

🎬 Concat — Free AI-Powered Video Editor

Concat is a free, open-source, cross-platform video editor designed as a local-first alternative to CapCut. It combines professional editing tools, AI-assisted media features, visual effects, and multi-track timelines in one application. Its native Rust engine and GPU compositor handle editing locally, without requiring an account, subscription, watermark, or cloud upload of your footage.

Whether you are creating social media content, YouTube videos, tutorials, podcast clips, or screen recordings, Concat provides a flexible editing workspace with offline-capable AI tools.

✂️ Video Editing and Timeline

- Split, trim, merge, ripple-edit, and rearrange clips. - Create multi-track timelines with video, images, overlays, and titles. - Use picture-in-picture, crop, flip, and blend modes. - Add freeze frames and adjust playback speed. - Animate position, scale, rotation, opacity, volume, and effects with keyframes. - Use the curve editor for animation control.

🤖 AI-Powered Tools

Concat includes AI-assisted features that can run locally after downloading their models.

- Automatic captions: Generate subtitles with local Whisper models and customize their appearance. - Text-to-speech: Create voiceovers using built-in local voices. - Voice cloning: Generate speech from a voice sample. - Background removal: Isolate people or objects with optional manual mask painting. - Voice enhancement: Reduce noise, improve speech clarity, and normalize loudness.

Downloaded AI models can work offline afterward.

🎨 Effects, Filters, and Titles

- More than 100 effects, filters, and transitions. - GPU-rendered effects with live preview. - Customizable titles with fonts, outlines, shadows, and background plates. - Multiple blend modes and animation controls. - Audio effects and voice transformations.

🎧 Audio and Media Controls

- Denoise and enhance voice recordings. - Adjust loudness and volume. - Apply effects such as robotic, telephone, and pitch-shifted voices. - Preview and edit audio alongside video in the same project.

📤 Export and Performance

- Export in H.264, HEVC, and AV1 formats. - Supports resolutions up to 4K at 60 FPS and 10-bit color. - Native Rust editing engine with GPU compositing. - Proxy media and hardware decoding support. - Local processing keeps your footage on your device.

🔌 Automation and AI Integration

Concat includes a Model Context Protocol (MCP) server for compatible AI agents and a JSON-RPC API for scripts and external automation. Source builds also provide gRPC and command-line tooling.

📱 Platform Support

Available for Android, Windows, macOS, Linux, and iOS/iPadOS through sideloading. The project is currently in beta, so feature availability and performance may vary between platforms.

📜 License

Concat is licensed under the GNU Affero General Public License v3.0 (AGPL-3.0). You may use, modify, and redistribute the software under its conditions. If you modify the program and make it available for network use, you must offer users access to the corresponding source code. Distributed modified versions must also comply with the applicable licensing and notice requirements.

⚠️ Important Disclaimer

Concat is an independent video-editing project and is not affiliated with CapCut or ByteDance. AI output quality and editing performance depend on the selected models and device hardware. Some features require additional model downloads and storage space.

Create locally. Edit freely. Bring your ideas to life.