PNG File: What is a .PNG file, and how do I open it?

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PNG File: What is a .PNG file, and how do I open it?

PNG is the acronym for “Portable Graphics Format”. It is one of the most frequently used uncompressed image formats on the internet. This lossless data compression format was created to replace the Graphics Interchange Format (GIF) in order to avoid the 256 colors limitation. Lossless data compression means that the quality of the picture is not reduced even at high compression.

The file format is an open format with no copyright limitations. Like GIF images, PNG also have the ability to display transparent backgrounds (32 bit RGB). In addition, these files are capable of containing 24bit RGB color palettes and greyscale images. This image format was designed to ensure a fast transfer of images on the internet.

The motivation for creating the PNG format was the realization, in early 1995, that the Lempel–Ziv–Welch (LZW) data compression algorithm used in the Graphics Interchange Format (GIF) format was patented by Unisys. There were also other problems with the GIF format that made a replacement desirable, notably its limit of 256 colors at a time when computers with far more advanced displays were becoming common.

How to open PNG images with ImagePrint:

  1. Launch Coragi ImagePrint
  2. Choose Insert > Image
  3. Find the image file you wish to open
  4. Select the file(s)
  5. Edit and save your file
Ulf Emsoy has long working experience in project management, software development and supply chain management.

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