ImageOptim is a macOS image optimizer and GUI image compressor designed to reduce image file sizes for web and disk storage. It functions as a lossless image optimizer that removes unnecessary metadata and optimizes encoding to reduce file sizes without losing pixel data.
The main features of imageoptim/imageoptim are: Image Compression Tools, Source-to-Image Builders, Image Compressors, macOS Native GUIs, Image Optimization Tools, Lossless Optimization, macOS Media Utilities, Command Line Wrappers.
Open-source alternatives to imageoptim/imageoptim include: kyleduo/tinypng4mac — TinyPNG4Mac is a native macOS image compression client and desktop optimizer. It serves as a wrapper for the TinyPNG… imagemin/imagemin — imagemin is a Node.js image optimizer and minification tool designed to reduce the storage size of image assets. It… lymphatus/caesium-image-compressor — Caesium is an image compression tool that reduces file sizes for JPG, PNG, WebP, and TIFF images while preserving… google/guetzli — Guetzli is a lossy image compression tool and perceptual JPEG encoder. It converts PNG or JPEG inputs into… mzucker/noteshrink — NoteShrink is a document image optimizer and handwritten note PDF converter designed to transform scans of handwritten… sindresorhus/gifski-app — gifski-app is a native macOS desktop application used to convert video files into high-quality animated GIFs. It…
TinyPNG4Mac is a native macOS image compression client and desktop optimizer. It serves as a wrapper for the TinyPNG API, allowing for the reduction of image file sizes and format conversion without the use of a web browser. The utility integrates directly into the macOS environment, providing workflow automation through the Finder and system right-click context menus. It also supports drag-and-drop file handling to initiate the compression process. The application manages image processing by communicating with a remote service via a REST API, utilizing asynchronous request queues to handle
imagemin is a Node.js image optimizer and minification tool designed to reduce the storage size of image assets. It functions as a build pipeline asset optimizer that employs both lossy and lossless compression to remove unnecessary metadata and optimize pixel data. The project uses a plugin-based architecture to extend its functionality, loading external modules that handle specific image formats and compression algorithms. This allows the tool to serve as a flexible toolkit for automating image compression within development pipelines. The system covers broad capabilities for web performan
Guetzli is a lossy image compression tool and perceptual JPEG encoder. It converts PNG or JPEG inputs into high-density JPEG files, reducing file size by removing data that the human eye cannot easily detect. The tool utilizes human vision models to optimize the balance between file size and visual fidelity. It employs perceptual quality metrics and psychovisual similarity estimation to maintain high visual quality while maximizing compression density. The project includes a visual difference analyzer capable of generating spatial difference heatmaps and calculating scalar similarity scores.
Caesium is an image compression tool that reduces file sizes for JPG, PNG, WebP, and TIFF images while preserving visual quality and metadata. It operates as a cross-platform desktop application with a graphical interface, a command-line tool for scripting and automation, and a web-based interface for browser uploads, all supporting batch processing of multiple images at once. The tool distinguishes itself by offering multiple interaction modes — desktop, terminal, and web — each capable of handling the same core compression tasks. It preserves folder structure when saving compressed images,