PNGOUT
| PNGOUT | |
|---|---|
Two runs of PNGOUT with randomization in Microsoft Windows | |
| Original author(s) | Ken Silverman |
| Developer(s) | Ken Silverman |
| Initial release | January 15, 2002 |
| Stable release | February 13, 2015
|
| Operating system | Microsoft Windows |
| Type | Image optimizer |
| License | Freeware |
| Website | advsys |
PNGOUT is a freeware command line optimizer for PNG images written by Ken Silverman. The transformation is lossless, meaning that the resulting image is visually identical to the source image. According to its author, this program can often get higher compression than other optimizers by 5–10%. It is possible to compress some inflated PNGs to a size below 1% of the original file.
PNGOUT was also available as a plug-in for the freeware image viewer IrfanView and can be enabled as an option when saving files. It allows editing of various PNGOUT settings via a dialog box. PNGOUT integration was removed in IrfanView version 4.58 in favour of OptiPNG.
In 2006, a commercial version of PNGOUT with a graphical user interface, known as PNGOUTWin, was released by Ardfry Imaging, a small company Silverman co-founded in 2005. There is also a freeware GUI frontend to PNGOUT available, known as PNGGauntlet.