Cropbox

Cropbox is a lightweight desktop tool for trimming, cropping, previewing, and exporting video, animated GIF, and still-image media.

It supports both an interactive PySide6 desktop app and a headless export path through the cropbox command-line interface.

Highlights

• Open common video formats including MP4, MOV, MKV, and WebM
• Preview animated GIFs with timeline trim and frame stepping
• Create and adjust crop rectangles directly on the media preview
• Apply resize, rotation, and flip transforms before export
• Export to MP4, MOV, GIF, PNG stills, and PNG sequences
• Launch the UI with initial trim, crop, and playhead state from the CLI
• Run direct exports without opening the desktop window

Documentation

• Getting Started
• Usage Guide
• CLI Reference
• API Reference

Requirements

• Python 3.8 through 3.12
• ffmpeg
• ffprobe

Cropbox checks for ffmpeg and ffprobe on startup and shows install guidance from Help -> Install FFmpeg when they are missing.