Advanced PNG (Portable Network Graphics) optimizer
  2 reviews

OptiPNG is a PNG optimizer that recompresses the image files to a smaller size. It losslessly reduces the bit depth, the color type and the color palette of the image, runs a suite of compression methods and strategies, and selects the compression parameters that yield the smallest output file. It also recognizes several external file formats like BMP, GIF, TIFF and PNM (PBM, PGM, PPM).
Latest reviews
jahid_0903014 5 years ago

Very useful tool. For JPG see jpegoptim

tomasfox 8 years ago

Good for compressing png files without losing quality