Concat
Free open-source video editor for macOS, Windows, Linux, and Android.
Local-first video editor with AI auto-captions, keyframes, and scriptable agent control.
Concat is a free, open-source video editor built on a native Rust engine with a GPU compositor. It suits creators making short-form content, tutorials, or podcasts who want local processing without subscriptions, watermarks, or cloud uploads.
What it is
It provides multi-track cutting, 4K export, and local AI capabilities including Whisper auto-captions, voice cloning, text-to-speech, and background removal. You can also drive it programmatically using its JSON-RPC, gRPC, and Model Context Protocol (MCP) API for automated editing.
Who it's for
It suits solo creators, editors, and developers looking to script video workflows locally. It does not suit teams requiring real-time cloud collaboration or users who refuse to download local AI models.
Key features
Local AI Models
Run offline Whisper auto-captions, background removal, and voice cloning directly on your hardware.
MCP and API Control
Drive the editor using JSON-RPC, gRPC, and MCP protocols to let AI agents cut video.
GPU-Rendered Effects
Apply keyframe animations, 170+ filters, transitions, and titles live in the preview.
Multi-Platform Desktop
Edit projects natively across macOS, Windows, Linux, and Android using the same engine.
Up and running in 3 steps
Our honest verdict
What's great
- Zero subscription fees, watermarks, or mandatory user accounts
- Completely offline workflow keeps your source footage entirely local
- Unique API support including MCP enables programmatic video editing
- Built on a native Rust engine with hardware decode for smooth 4K scrubbing
Where it falls short
- Software is currently in beta with potential rough edges
- Requires substantial local hardware, up to 16 GB RAM for 4K timelines and large AI models
- macOS binaries are unsigned, requiring manual quarantine attribute removal to open
- Optional AI models must be downloaded separately, taking up local disk space
Pricing & license
Concat is entirely free with no paid tiers, subscriptions, or accounts required. The only cost is running it on your own hardware.
Open remote AI-training roles
870 open remote AI-training roles, updated November 14, 2026; most pay $20–$170 an hour. Zekai lists them free; the application goes to the employer’s platform.
Alternatives
These reviewed AI tools do the same job instantly — from our scored directory.
Use it, or have us set it up
FAQ
Does Concat upload my footage anywhere?
No. Everything runs 100% locally on your machine, and your files never leave your disk.
How do I install it on macOS if it fails to open?
Because binaries are unsigned, run xattr -dr com.apple.quarantine /Applications/Concat.app in your terminal.
Can AI agents edit video using this tool?
Yes. Concat includes JSON-RPC, gRPC, and MCP APIs designed for scriptable and agent-driven video production.
