spaceman-diff ☆

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Description:
Diff images from the command-line

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: images diff cli developer-tools testing

Install: brew install spaceman-diff

About:
SpacemanDiff is a command-line utility that visually compares two images by highlighting their pixel-by-pixel differences. It renders the diff directly in the terminal using ANSI escape codes, making it ideal for developers who need to quickly verify image assets without leaving their console. This tool is particularly useful for automated visual regression testing and debugging image processing pipelines.

Key Features:

Renders image diffs directly in the terminal using 24-bit color
Supports common image formats like PNG and JPEG
Simple command-line interface with minimal dependencies
Outputs pixel differences as colored blocks for easy visual inspection

Use Cases:

Debugging image generation or processing scripts in headless environments
Performing quick visual regression tests in CI/CD pipelines
Comparing screenshots or UI assets during frontend development

Alternatives:

ImageMagick – More powerful and versatile for complex image manipulation, but heavier and not specifically designed for terminal-based diffing.
pixelmatch – A Node.js library for pixel-level comparison, often used in browser-based testing frameworks rather than as a standalone CLI tool.

Version History

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