png PNG stands for portable network graphics. It is the raster graphics format associated with the .png filename extension. Unlike GIF format, the limitation of 256 colors does not hold with the PNG format. In fact this among other reasons was the motivation behind development of the PNG format to improve upon the GIF format. The PNG format however uses a single image format and thus does not support animations. Because the format was engineered to ease the distribution of graphic files across computer networks it is also not well suited for professional graphics.
svg SVG or Scalable Vector Graphic File is a graphical format for images which are bi-dimensional and XML-based providing support to animations and various interactive elements. The SVG file format was developed with the open standards created in 1999 by the W3C (Worldwide Web Consortium). Adobe Corporation held the significant role towards the development of this file format, and it is considered to be the industry standard for viewing vector graphics on web networks. SVG images can be created, edited, and recreated in any of the text editing tools and drawing or illustration software. Additionally, SVG can be compressed, searched, scripted, and indexed.