ImageOptim
ImageOptim makes images load faster. Removes bloated metadata. Saves disk space & bandwidth by compressing images without losing quality.
TruePNG is one of the most advanced PNG optimizers available. It does the most exhaustive checks for reductions, that lets it to optimize further, even if it uses a less efficient compression algorithm than others tools.
TruePNG is one of the most advanced PNG optimizers available. It does the most exhaustive checks for reductions, that lets it to optimize further, even if it uses a less efficient compression algorithm than others tools.
Source: http://cssig.net/articles/truepng
File compression PNG Compression
Productivity Social Phots and Graphics File Management
file-archiving image-processing command-line-interface png compressor file-compression image-compression optimization optimizer image-optimizer optimize lossless png-optimization png-compression compress-png quantization lossy
ImageOptim makes images load faster. Removes bloated metadata. Saves disk space & bandwidth by compressing images without losing quality.
Free Open Source Mac OS X
-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 .
Free Windows
PngOptimizer compresses graphics files and removes extra, unnecessary data without affecting quality. It will update PNG files or converting BMP, GIF or TGA files to the PNG format using simple drag-and-drop.
Free Open Source Windows
optimus.io offers lossless compression of images available with a WordPress plugin and via API. Benefits: - The file size will be reduced but the image quality remains the same - Bulk optimization - Conversion also to WebP available
Freemium Web Wordpress
Optimize pictures without quality lossless. With Black Bird Image Optimize - you can reduce the size of your photos several times without quality loss!.
Freemium
A collection of recompression utilities for your ZIP archives, PNG snapshots, MNG video clips and GZ files.
Free Open Source Mac OS X Windows Linux
Drag your PNGs onto PNGCrushrrr and get super-optimized files ready to be emailed or posted on the web! Supports one or more files being dropped and instead of...
Free Mac OS X
Works with all common image formats like png, jpeg, bmp, tiff and Microsoft Office documents pptx, docx, xlsx.
Free Mac OS X Windows