ImageMagick
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.
pngquant is a command-line utility and a library for lossy compression of PNG images. The conversion reduces file sizes significantly (often as much as 70%) and preserves full alpha transparency.
pngquant is a commandline utility and a library for lossy compression of png images.
the conversion reduces file sizes significantly (often as much as 70%) and preserves full alpha transparency. generated images are compatible with all modern web browsers, and have better fallback in ie6 than 24bit pngs.features
* highquality palette generation using a combination of vector quantization algorithms.* unique adaptive dithering algorithm that adds less noise to images than the standard floydsteinberg.* easy to integrate with shell scripts, guis and serverside software.* fast mode for processing large numbers of images.
Productivity Social Phots and Graphics
image-processing png image-compression image-optimizer png-optimization
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.
Free Open Source Mac OS X Windows Linux iPhone iPad Xfce
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.
Free Windows GIMP XnView IrfanView
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
FileOptimizer is a lossless file size optimizer supporting AIR, APK, APNG APPX, BMP, CBZ, DOCX, DLL, EPUB, EXE, GIF, GZ, ICO, JAR, JPEG, MNG, MP3, MPP, PNG, PPTX, ODT, OGG, OGV, PDF, PUB, SCR, SWF, TIF, VSD, WEBP, XAP, XLSX, and ZIP file...
Free Open Source Windows Linux
File Converter is a very simple tool which allows you to convert and compress one or several file(s) using the context menu in Windows Explorer.
Free Open Source Windows Windows Explorer
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
Imaging is a Collection of Image Related Tools (Image Viewer, Image Converter, Image Resizer, Image Optimizer, etc). Features : 1. Color Picker 2. Duplicate Image Finder : find duplicate image 3.
Commercial 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
With JPEG Resampler you are able to change the resolution and size of JPEG images of a directory in one go and move them into another folder. Source as well as the destination location can be determined by the user freely.
Free Windows
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