Pingo Web Image Optimizer is described as 'Experimental, fast Web PNG/JPG optimizer which offer lossless, visually lossless or lossy compression. it performs image reductions over iterations thanks to recursive multi-processing and multithreading systems' and is an app in the Photos & Graphics category. There are more than 25 alternatives to Pingo Web Image Optimizer for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and Android. The best alternative is File Converter, which is both free and Open Source. Other great apps like Pingo Web Image Optimizer are ImageMagick (Free, Open Source), Caesium Image Compressor (Free, Open Source), RIOT - Radical Image Optimization Tool (Free) and ImageOptim (Free Personal, Open Source).
ImageMagick is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (about 100) including GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX.
Caesium Image Compressor lets you compress your pictures up to 90% without visible quality loss. Providing a simple yet effective interface with a real-time preview and multiple image processing at the same time, everyone will be able to reach the best result.
Saving images for web/email/other media with the best compression ratio and quality is a difficult task if you don’t have the right tools. Choosing the right format then choosing the right parameters are the key factors of smaller files.
ImageOptim is excellent for publishing images on the web (easily shrinks images “Saved for Web” in Photoshop). It's useful for making Mac and iPhone/iPad applications smaller (if you configure Xcode to allow better optimization).
XnConvert is an easy image converter for graphic files, photos and images available on Windows, MacOSX and Linux. It supports more than 400 file formats (jpeg, tiff, png, gif, camera raw, jpeg2000, WebP, OpenEXR, ...).
Compress and compare images with different codecs, right in your browser. Squoosh is an image compression web app that allows you to dive into the advanced options provided by various image compressors like OxiPNG, MozJPEG and JPEG XL.
TinyPNG uses smart lossy compression techniques to reduce the file size of your PNG files. By selectively decreasing the number of colours in the image, fewer bytes are required to store the data. The effect is nearly invisible but it makes a very large difference in file size!