Image Normalizer is a cross-platform command-line batch-processing tool that resizes and compresses images, transforming each image by:

OptiImage is described as 'Optimize images efficiently supporting PNG, JPEG, WebP, and SVG with flexible compression settings offering safe mode to prevent data loss' and is a Image Optimizer in the photos & graphics category. There are more than 50 alternatives to OptiImage for a variety of platforms, including Windows, Web-based, Mac, Linux and SaaS apps. The best OptiImage alternative is ImageMagick, which is both free and Open Source. Other great apps like OptiImage are Caesium Image Compressor, Dinky, ImageOptim and TinyFast.
Image Normalizer is a cross-platform command-line batch-processing tool that resizes and compresses images, transforming each image by:

Batch image compression for Mac — supports PNG, JPEG, GIF, WebP, SVG, HEIC with local processing, drag & drop, and quality preview.

Using advanced lossy compression, TinyPNG reduces PNG file sizes by 50-80%, preserving full transparency and minimizing quality loss. Ideal for web designers, it increases website speed, saves bandwidth, and offers tools like a Photoshop plugin and API for seamless integration.

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-Combines PNGOUT, OptiPNG, and DeflOpt to create the smallest PNGs -No image quality is lost — only file size -Converts JPG, GIF, TIFF, and BMP files to PNG -Ultra-configurable
PNGGauntlet is a .NET program that uses Ken Silvermans PNGOUT, OptiPNG and DeflOpt to optimize PNG fil.

OptiPNG is a command-line PNG optimizer that recompresses image files to a smaller size, without losing any information. This program also converts external formats (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG integrity checks and corrections.
A versatile online image compression tool that prioritizes your privacy. It handles everything locally in your browser—nothing is ever uploaded. Convert between JPG, PNG, GIF, and WebP, resize by dimension or ratio, and fine-tune quality with a live preview.



ImgSmaller is a privacy-first image compression tool that lets you compress JPG, PNG, and WebP images directly in your browser. No data leaves your device thanks to our Zero-Upload Mode. If your browser doesn't support this, the image is temporarily uploaded to our server...



MAZANOKE is a simple image compressor and converter that runs entirely in your browser. No external uploads, works offline as a web app, and is powered by Browser Image Compression.




GraphicsMagick is the swiss army knife of image processing. Comprised of 282K physical lines (according to David A. Wheelers SLOCCount) of source code in the base package (or 952K including 3rd party libraries) it provides a robust and efficient collection of tools and libraries...



Oxipng is a multithreaded lossless PNG compression optimizer in Rust. It can be used via a command-line interface or as a library in other Rust programs.
Gifsicle manipulates GIF image files. Depending on command line options, it can merge several GIFs into a GIF animation; explode an animation into its component frames; change individual frames in an animation; turn interlacing on and off; add transparency; add delays...