PNG
PNG (Portable Network Graphics) is a data format used for images, which emerged in 1996 as a replacement for the GIF format, due to the fact that the latter includes patented algorithms. This free format is recommended by the W3C, supports alpha channels, has a greater range of color depth, high detail (adjustable), among other features. In addition, the PNG format allows images to be compressed without loss of quality and removes the background of images using the alpha channel. The alpha channel, unlike GIF transparency, is capable of defining the opacity level of each pixel, adapting to any background on a website or presentation, without aliasing, something that cannot be achieved with other popular formats. Therefore, it is a valid format for images that need to maintain 100% quality for reuse. It can be used in most image editing programs such as Adobe Fireworks (proprietary) and GIMP (free). PNG files use the file extension PNG or png and were registered as a media type by MIME image/png. PNG was published as informational RFC 2083 in March 1997 and as an ISO/IEC 15948 standard in 2004.