Tinify maintains repositories for smart image compression for PNG and JPEG. Its public repositories include API client libraries for Node.js, PHP, Java, Python, Ruby and .NET, plus a WordPress plugin that optimizes JPEG and PNG images with TinyPNG. The organization also shares a list of third-party integrations.
pngquant is a command-line utility and library for lossy compression of PNG images. The conversion reduces file sizes significantly and preserves full alpha transparency. Generated images are compatible with all web browsers and operating systems. It offers a fast mode for real-time processing and integrates with shell scripts, GUIs and server-side software.
digiKam is an open-source digital asset manager and image editor for organizing, editing, and sharing photos and videos. It handles large collections, supports metadata viewing and editing, AI-based tagging and face recognition, advanced search, batch processing, and raw file processing. The project is free and open source.
FastStone Image Viewer is an image browser, converter and editor that supports major graphic formats including JPEG, PNG, GIF, TIFF and camera raw files. It is free for personal use and includes viewing, management, resizing, cropping and color adjustments.
CompressOrDie is a browser-based image compression tool that provides free compressors for JPEG, PNG, GIF, WebP, SVG and JPEG XL. Every format has its own dedicated tool, and all processing runs locally so images are not uploaded. The site is being rebuilt by a new operator, with tools restored step by step.
nomacs is a free, open source image viewer that supports multiple platforms and common image formats, including RAW and PSD. It also offers image editing such as cropping, resizing, rotating and color adjustments, and lets the same action be performed on multiple viewers for comparing images.
ImageGlass is a free, open-source image viewer for more than 90 formats, including WEBP, GIF, SVG, HEIC and RAW. Version 10 is rebuilt on .NET and Avalonia as a single codebase for Windows, macOS and Linux. The viewer includes a color picker, EXIF metadata viewing, crop and resize tools, frame navigation and HDR tone mapping.
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pngquant is a command-line utility and library for lossy compression of PNG images. The conversion reduces file sizes significantly and preserves full alpha transparency. Generated images are compatible with all web browsers and operating systems. It offers a fast mode for real-time processing and integrates with shell scripts, GUIs and server-side software.
digiKam is an open-source digital asset manager and image editor for organizing, editing, and sharing photos and videos. It handles large collections, supports metadata viewing and editing, AI-based tagging and face recognition, advanced search, batch processing, and raw file processing. The project is free and open source.
FastStone Image Viewer is an image browser, converter and editor that supports major graphic formats including JPEG, PNG, GIF, TIFF and camera raw files. It is free for personal use and includes viewing, management, resizing, cropping and color adjustments.
CompressOrDie is a browser-based image compression tool that provides free compressors for JPEG, PNG, GIF, WebP, SVG and JPEG XL. Every format has its own dedicated tool, and all processing runs locally so images are not uploaded. The site is being rebuilt by a new operator, with tools restored step by step.
nomacs is a free, open source image viewer that supports multiple platforms and common image formats, including RAW and PSD. It also offers image editing such as cropping, resizing, rotating and color adjustments, and lets the same action be performed on multiple viewers for comparing images.
ImageGlass is a free, open-source image viewer for more than 90 formats, including WEBP, GIF, SVG, HEIC and RAW. Version 10 is rebuilt on .NET and Avalonia as a single codebase for Windows, macOS and Linux. The viewer includes a color picker, EXIF metadata viewing, crop and resize tools, frame navigation and HDR tone mapping.
