Concat
Concat is a cross-platform video editor for creating and exporting local video projects on Mac without requiring an account or cloud upload.
What is Concat?
Concat is a desktop video editor for macOS and other platforms that helps users cut, arrange, caption, and export video projects locally on their device. It is aimed at people who want an editing workflow similar to short-form social video tools while keeping project work on their own machine. Common uses include trimming clips, building multi-track timelines, adding titles, adjusting speed, and exporting finished videos. Concat also supports offline features such as locally run captions and text-to-speech tools, which can be useful for creators who prefer not to upload media to a web service. In addition to the graphical editor, the project offers guides and developer-facing automation options for scripted workflows. Concat is published by Concat and is available for Mac, Windows, Linux, Android, and iOS beta builds.
Key features
- Edit video on a multi-track timeline
- Trim, split, merge, and arrange clips
- Add titles and styled text to projects
- Generate captions locally on your device
- Use local text-to-speech voices for narration
- Adjust clip speed and apply transitions
- Reuse work with templates
- Export finished edits without a required account
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Safety overview
Status: Use with caution
Concat is legitimate editing software, but Mac users should know the current macOS build is distributed outside the App Store and is not code-signed. That can trigger Gatekeeper warnings and extra install steps, so it is best to download it only from the official site and avoid modified copies from third-party download pages. The app works with your local media files, project settings, and exported videos, which is normal for a video editor. If you no longer use it, removing the app may also remove access to saved settings, templates, and local project-related data stored in its support folder.
Recommendation: Keep Concat if you actively edit video with it or want an offline-first editor on your Mac. If you installed it only for testing and no longer need it, you can remove it along with its support data after backing up any projects, exports, templates, or settings you want to keep.
Common paths
/Applications/Concat.app
Support paths
~/Library/Application Support/app.concat.editor
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