Converting your PCX file to JPEG is a good idea if you want to use it online. To do so, open your PCX in Adobe Photoshop and save it as a JPEG. However, you might lose some of the data in the file as it transfers to this lossy file type.
PCXs are a
raster file type — that is, they’re a pixel-based file format. On the other hand,
vector files use graphs and algorithms to display images. Vector files can scale to any size without appearing grainy or pixelated. You can use vector files for drawings, logos, and illustrations, but raster files tend to be better for photos.
MS-DOS was an early Microsoft operating system, gradually superseded by Windows. PCX was a standard format for MS-DOS.
ZSoft developed PC Paintbrush as a rival to the Macintosh MacPaint program. PCXs were also known as ZSoft Paintbrush files.
Much of the reason why JPEG, GIF, and PNG overtook PCX was because those formats were more efficient, adaptable, and sophisticated — overall, better for the world of web-based computing.
DCX files are multi-page PCXs with a different header. Essentially a DCX file is a multi-pace PCX that introduces a set of following PCX files.