Portable Network Graphics

Portable Network Graphics (.png) is an extensible file format for the lossless, portable, well-compressed storage of raster images. PNG provides a -free replacement for GIF and can also replace many common uses of TIFF. Indexed color, grayscale and RGB images are supported, plus an optional alpha channel. Sample depths range from 1 to 64 bits per pixel, supporting up to 48-bit RGB color with a 16-bit alpha channel.. 1997-08-07.A guide to PNG optimization by Cosmin Truţa, SourceForge. Accessed 2022-01-14.
==Description==
PNG is designed for online viewing applications, such as the World Wide Web, so it is fully streamable with a option. PNG is robust, providing both full file and simple . Also, PNG can store and data for improved color matching on various platforms.
==="Minified" PNGs===
PNGs normally support alpha channels to support transparency at 8 or 16-bits per pixel. However, it is also possible to create a "minified" 8-bit indexed color image with a "cheap" alpha channel; though this format is supported in most modern web browsers, it has not been as widely supported by graphics software until relatively recently.Chapter 8. PNG Basics: Palette-Based with Transparency by Greg Roelofs, PNG: The Definitive Guide, 2nd ed. O'Reilly & Associates. 2003.Transparent PNG loses anti-aliasing in Photoshop, StackExchange. 2014-05-19.
==References==
==See also==
*SVG (Scalable Vector Graphics), for online vector images.
==External links==
*PNG (Portable Network Graphics) at the World Wide Web Consortium
*Portable Network Graphics (PNG) Specification and Extensions by Greg Roelofs
*PNG tech: Technical articles on the PNG file format at SourceForge
*Portable Network Graphics at the Adobe Wiki
* at Wikipedia
===Online PNG tools===
*Compress PNG
*PNG Compressor at Gift of Speed
*PNG minifier at Photopea
*TinyPNG
Category:Graphics file formats