E-mage

From developers to developers: a cross-platform tool for losslessly image compression.

Caesium Image Compressor

Compress your pictures up to 90% without visible quality loss.

Convert and Rename images in batch mode Support JPEG, BMP, GIF, PNG, TIFF and JPEG2000

FileOptimizer is a lossless file size optimizer supporting AIR, APK, APNG APPX, BMP, CBZ, DOCX…

Free PDF Compressor removes duplicate PDF objects and employs new compression features in recent…

GraphicsMagick is the swiss army knife of image processing.

Lets you resize images by right-clicking.

ImageAlpha is a GUI for pngnq and pngquant.

Faster web pages and apps.

Utilities for archiving photos for saving to long term storage or serving over the web.

JPEGmini - The Photo Optimization Tool Trusted by Tens of Thousands Image Perfectionists

OptiPNG is a command-line PNG optimizer that recompresses image files to a smaller size, without…

Advanced image optimization tool

‘-Combines PNGOUT, OptiPNG, and DeflOpt to create the smallest PNGs

PngOptimizer compresses graphics files and removes extra, unnecessary data without affecting…

Compress and compare images with different codecs, right in your browser

XnConvert is an easy image converter for graphic files, photos and images available on Windows…

Pngcrush is an optimizer for PNG (Portable Network Graphics) files.