MediaSeg

Split large media files into upload-ready chunks on macOS

Productivity · free · 2026.08.01
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By Sho Nishikawa, ExaEdge
MediaSeg screenshot

MediaSeg is a lightweight macOS utility designed to solve a common problem in modern media workflows: large files that exceed upload size limits. It allows users to split videos and audio files into smaller, upload-ready segments while keeping the entire process local on their machine.

The app is particularly useful for workflows involving platforms with file size restrictions, such as AI-powered analysis tools, document assistants, and other upload-based services. Instead of manually compressing files or searching for third-party conversion tools, users can quickly divide large media into manageable chunks.

MediaSeg currently supports popular video formats including MP4, WEBM, and MOV, with experimental support for audio formats such as M4A, MP3, and WAV. This makes it suitable for a variety of use cases, from preparing meeting recordings and educational materials to processing long-form media content.

As a local macOS application, MediaSeg keeps files on the user’s device during processing, providing a more private alternative to online splitting services. Recent updates have also introduced customization features such as theme selection and language support, improving usability for different users.

Overall, MediaSeg focuses on a simple but practical workflow improvement, helping Mac users handle large media files more efficiently without relying on cloud-based tools or complicated editing software.