| Extension | PNG |
| Full Name | Portable Network Graphics |
| Type | Image |
| Mime Type | image/png |
| Format | Binary |
| Opens With | Paint.Net, Photoshop |
PNG files are a widely used graphics file format used in areas where high-quality images (often with transparency) are required while also retaining a small file size. They are one of the most common formats of file used for web and print mediums and are particularly useful for logos, icons, and other images where multi-level transparency is desired.
The format itself was created in the 1990's with the main aim of storing computer graphics in a high-quality format while minimizing the required storage space. The longer-term aim was to displace the GIF file format and make PNG the number one format for non-lossy, high-quality image formats on the then-burgeoning world wide web.
One of the selling points of the PNG format is its support for multiple levels of transparency, making it superior to the GIF format, which can only handle a single level of transparency. Also, like GIFs, the PNG format supports palletizing image colours down to 256 or 16 colours to help reduce the file size of the PNG.
| Extension | DXF |
| Full Name | Drawing Exchange Format |
| Type | CAD |
| Mime Type | image/x-dxf |
| Format | Binary |
A DXF file was created by Autodesk as a standardized format for storing complex 2D and 3D Computer Aided Design (CAD) drawings in a single, standard package that can be used for seamless exchanging of data between different CAD systems.
The DXF format is plain text and allows CAD elements such as points, lines, curves, and other elements to be represented in an efficient manner that is easy to read by other CAD applications. The use of plain text does, however, cause the files to grow in size quickly when storing large and complex CAD drawings.
As DXF files are designed from the start to be an open and standard format, there are many CAD and 2D drawing applications that offer support for importing and exporting to the DXF format.
