OptiPNG Downloads

OptiPNG will also help you convert external formats (GIF, PNM, BMP, and TIFF) to optimized PNG, and will perform PNG integrity checks and corrections.

The main purpose of OptiPNG is to optimize PNG files, i.e. to reduce their size to a minimum, without losing any information.

In order to achieve this goal, OptiPNG performs the following tasks:
· OptiPNG losslessly reduces the bit depth, the color type and the color palette of the image. This step reduces the size of the uncompressed image, which, indirectly, reduces the size of the compressed image (i.e. the size of the PNG file).
· OptiPNG runs a suite of compression methods and strategies and selects the parameters that yield the smallest output file.
· OptiPNG concatenates all the IDAT data in a single chunk, minimizing the overhead incurred by chunk headers and CRCs.

In addition, OptiPNG has the following capabilities:
· OptiPNG offers a suite ...