.25 — Picture Processor
ZSoft Corporation · 1982
PCX is an early bitmap image format from the 1980s, notable for its use in early desktop publishing and graphics software.
Key Features
- Early bitmap image format
- Uses RLE compression for smaller file sizes
- Supports various color depths and modes
- Simple structure, widely compatible in its era
Best For
- Preserving historical image data from the PC era
- Compatibility with very old software and systems
- Simple, uncompressed or RLE-compressed graphics
Less Ideal For
- High-quality photographic images on the web
- Images requiring alpha transparency or animation
- Modern graphic design workflows
- Applications needing advanced color management
Common Use Cases
- Storing graphics for early desktop publishing software
- Displaying images in older operating systems and applications
- Archiving retro digital art and game assets
- Used in some fax software for image transmission
How to Open It
- Open PCX files using image editing software like Adobe Photoshop or GIMP.
- Many older graphics viewers and editors, such as Paintbrush or CorelDRAW, can also open them.
- Online file converters can convert PCX to more common formats like PNG or JPG.
What is a .25 file?
The .25 file extension is primarily associated with the Picture Processor (PCX) image format. Developed by ZSoft Corporation in the early 1980s, PCX was one of the earliest widely used bitmap image formats on IBM PC compatible computers. It supported various color depths and was commonly used for graphics in desktop publishing and early multimedia applications. While largely superseded by more advanced formats like PNG and JPG, PCX files can still be encountered, particularly in legacy systems or retro computing contexts. Its simplicity and early adoption made it a significant format in the history of digital imaging.
Programs That Open .25 Files
| Platform | Program | ||
|---|---|---|---|
| Windows | GIMP | Free | |
| IrfanView | Free | ||
| Paint.NET | Free | ||
| macOS | GIMP | Free | |
| Preview (with conversion) | Free | Official | |
| Linux | GIMP | Free | |
| ImageMagick | Free | ||
| Android | Image Viewer apps (e.g., XnView MP) | Free | |
| iOS | Image Viewer apps (e.g., Documents by Readdle) | Free | |
| Web Browser | Online Converters (e.g., CloudConvert, Zamzar) | Free |
How to Convert .25 Files
| Format | Method |
|---|---|
| .PNG | GIMP, IrfanView, Online Converters |
| .JPG | GIMP, IrfanView, Online Converters |
Common Problems with .25 Files
Frequently Asked Questions
Its primary advantage was its early adoption and relatively small file size due to RLE compression, making it suitable for storage and transfer in the limited computing environments of the 1980s.
Modern image formats like PNG and JPEG offer superior compression, better color support (including transparency and wider color gamuts), and are better optimized for web and high-resolution displays.
No, the PCX format does not support alpha channel transparency.
Technical Details
PCX files are a raster graphics format that uses RLE (Run-Length Encoding) compression, making them relatively compact for their time. They store pixel data in planes, and can support various color modes including monochrome, 16-color, 256-color, and 24-bit color. The header contains information about image dimensions, color depth, and palette.