Here are the instructions how to convert png24 images into png8 for ie6 goodness, all through the command line using open source tools (i think) pngquant +pngout + pngcrush.ġ- quantize image into 256 (so basically png8′s look crap with large sprites or sprites with a large colour range). You will be able to control compression, number of colours, meta data settings and much more, and select image format (JPEG, GIF or PNG) for your output file.Īnother possibility is to use a combination of pngquant, pngout, and pngcrush, as described here, but this is from the command line.

The image optimizer is lightweight, fast and simple to use, yet powerful for advanced users. It uses with a side by side (dual view) or single view interface to compare the original with the optimized image in real time and instantly see the resulting file size. Radical Image Optimization Tool (RIOT for short) is a free image optimizer that will let you to visually adjust compression parameters while keeping minimum file size.

Image quality tinypng vs photoshop