Convert PCX Image Free

How to Convert Files

PCX is a DOS-era paint format from 1985, obsolete for decades. This page explains what it was and what to do with one.

Inside a PCX File

PCX came from PC Paintbrush in 1985 and was, for a while, the closest thing the DOS world had to a standard image format. It uses run-length encoding on indexed colour, typically with a palette of 256 entries or fewer.

The design reflects its hardware. Palette-based colour, simple RLE, and a scanline structure that mapped onto the display adapters of the mid-1980s: all sensible then, all limitations now.

Purely Historical

Nothing produces PCX today. GIF supplanted it, PNG supplanted GIF, and no current software offers it as a save option except for compatibility with archives.

If you have PCX files they are almost certainly old artwork or scans worth rescuing. Converting to PNG keeps the pixels exactly, since both are lossless, and produces a file that current software opens without ceremony.

Origin and Evolution

PCX was developed by ZSoft in 1985 as part of the PC Paintbrush software. It addressed the need for a standardized image format in the DOS environment, allowing for simple and efficient storage of bitmap images. The format gained popularity due to its ease of use and compatibility with various DOS applications, becoming a de facto standard for graphics in that era.

Over time, PCX saw limited evolution, primarily remaining static in its specifications. As graphics technology advanced, newer formats like GIF and PNG emerged, offering better compression and color depth. Despite its decline, PCX remains relevant for legacy systems and archival purposes, with some niche software still supporting it. Its simplicity and historical significance make it an important format in the context of early computer graphics.

Using PCX Today

Choose PCX when working with legacy DOS applications or when you need to maintain compatibility with older software that requires this format. It is suitable for simple graphics without requiring high fidelity. However, be aware that modern image editing programs may not support PCX directly, necessitating conversion to more current formats for editing.

When converting to or from PCX, ensure that the color palette is compatible to avoid loss of image quality. Tools like ImageMagick can facilitate conversion, but verify the output to maintain fidelity. Additionally, take note of file size limitations and the maximum color depth of 256 colors, which may restrict the use of PCX for more complex images.

What to Do With PCX Files

PCX files today are almost always artefacts: clip art from a DOS-era CD, scans from a 1990s office, or graphics from software that no longer runs. The content is often genuinely worth keeping even when the format is not.

The conversion is safe because both PCX and PNG are lossless. The palette maps across, the pixels are identical, and the result is typically much smaller because DEFLATE outperforms run-length encoding on almost anything. Nothing is approximated.

PCX is one of the oldest PC image formats, using a simple run-length encoding that compresses flat, sharp graphics well but photographs poorly. Its historical role as the native format of PC Paintbrush, rather than any modern capability, is what it is remembered for.