Apps similar to PNGOUTWin include Dinky, which is free and open source. Other options are XnConvert, GetCompress, ImageOptim and TinyFast. Image Optimizers like PNGOUTWin are a crowded field, with more than 50 alternatives for Windows, Mac, Linux, the web and Android.
If you want a lightweight image editor that you can use to perform basic editing tasks such as cropping, renaming, resizing and even applying watermarks to your pictures, then consider rEASYze. You can work with single or multiple images simultaneously.
Germany
EU
Optimize pictures without quality lossless. With Black Bird Image Optimize - you can reduce the size of your photos several times without quality loss!.
Ukraine
IMAGEmini, a powerful photo resizer and optimizer, allows you to optimize all your photos by 80% ~ 20% comparing to their originals while keeping their original resolution, quality and png, jpg, gif formats.
China
Powerful and intuitive online tool for viewing, resizing, cropping, and converting images. It supports all major formats, including AVIF, WebP, HEIC/HEIF, TIFF, and 32-bit HDR/EXR. Enjoy the unique Live Preview feature that lets you see real-time conversion results before downloading!
A Mac app and Chrome extension that optimizes/compresses images and PDFs. Tinybeest also converts file formats and resizes images for the web.
free online image compressor for faster websites! reduce the file size of your webp, jpeg, and png images with tinypng.
Free native macOS image compressor for Apple Silicon. Drop PNG, JPEG, GIF, SVG, WebP, AVIF or HEIC files onto the window and get smaller copies beside the originals.
Canada
Shrinks images and documents losslessly by optimizing existing compression. Run it comfortably in the background to save hard disk space and bandwidth.
Minime is a free and open-source desktop image compressor and format converter for Windows, macOS, and Linux. Built in Rust, it focuses on lossless image optimization while keeping everything private and local to your device.
BelgiumEU
Mini-Compressor is an easy to use image compression tool. Compress images by right clicking on the images or folder of images. A viable alternative to other photo editing software if all you need to do is quickly compress a image.
Smolr is a small tool that let you convert and optimize your image files to make them smaller and more usable.
