A command-line tool that automates ImageOptim, ImageAlpha, and JPEGmini for Mac to batch-optimize images in build processes.
ImageOptim-CLI is a command-line tool that automates the image optimization process by integrating with macOS applications like ImageOptim, ImageAlpha, and JPEGmini. It allows developers to batch compress PNG and JPEG files as part of their automated build or deployment workflows, reducing image file sizes without sacrificing quality. The tool is designed to provide superior compression results compared to many alternative optimization utilities.
Developers and DevOps engineers working on macOS who need to automate image optimization within their build pipelines, CI/CD systems, or local development workflows.
It offers a simple, unified interface to leverage proven, high-performance GUI optimization tools in an automated, scriptable manner, often yielding better compression ratios than standalone CLI alternatives.
Make optimisation of images part of your automated build process
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Benchmarks referenced in the README show it outperforms alternatives like Kraken.io and TinyPNG, providing better file size reduction for both lossless and lossy optimizations.
It processes multiple images in one command, seamlessly integrating into CI/CD pipelines and build scripts, as emphasized in the project's description for automated workflows.
Offers command-line flags to enable/disable specific optimizers (ImageAlpha, JPEGmini) and adjust settings like quality ranges and color palettes, giving precise control over the optimization process.
Distributed as a standalone binary, it doesn't require Node.js or other runtimes to be installed, simplifying deployment in various environments.
It is inherently bound to macOS because it automates OS-specific applications like ImageOptim and JPEGmini, making it unusable on Windows or Linux, as confirmed in the FAQ.
Requires separate installation of ImageOptim, ImageAlpha, and optionally JPEGmini—none are bundled, adding setup complexity and potential costs (JPEGmini is paid).
Enabling JPEGmini automation demands granting accessibility permissions for GUI scripting, a non-trivial configuration step that can be confusing for users, as noted in the warnings section.