Apps similar to Oxipng include Caesium Image Compressor, which is free and open source. Other options are Dinky, XnConvert, GetCompress and ImageOptim. Image Optimizers like Oxipng are a crowded field, with more than 100 alternatives for Windows, Mac, the web, Linux and Android.
Leanify is a lightweight lossless file minifier/optimizer. It removes unnecessary data (debug information, comments, metadata, etc.) and recompress the file to reduce file size. It will not reduce image quality at all.
optimus.io offers lossless compression of images available with a WordPress plugin and via API.
Switzerland
Don’t spend another second worrying about compressing your images. Install Imgbot into your GitHub projects, and focus on your application.
The ultimate image optimization tool to compress your images in JPEG and PNG formats for sharing and posting on web pages.
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
ETK Image Compressor Pro is a fast, lightweight Windows app that drastically reduces image file sizes while keeping excellent visual quality. Supports adjustable quality for WebP,PNG, TGA, EXR, JPEG, batch compression, 8K images, and works fully offline.
Compress or convert images on the web with offline support. Images are not uploaded on server and processed on client with webassembly. Support for formats like JPEG, PNG, WebP, AVIF and JXL.
jStrip is a free tool to reduce the file size of JPEG images without sacrificing image quality. High-traffic websites with many JPEG images can benefit from decreased bandwidth costs. Less hard disk space will be used by image collectors.
An image converter batch-processing multiple files. JPEG lossless transformations are implemented.
Free EXIF Eraser is a free lightweight software that allows you to easily and effectively delete entire EXIF/IPTC/XMP information from image files.
A powerful photo resizer and optimizer for Mac, allows you to optimize all your photos by 80% ~ 20% comparing to their originals while keeping their original resolution, quality.
China
Crunch - Insane(ly slow but wicked good) PNG image optimization. It combines selective bit depth, color type, and color palette reduction with zopfli DEFLATE compression algorithm encoding using embedded versions of the pngquant and zopflipng PNG optimization tools.
