Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your XCF images to DCX format. This tool works for both professionals and casual users. Convert your images to DCX in seconds.
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GIMP Image
The native project format of the GNU Image Manipulation Program.
XCF (eXperimental Computing Facility) is the native file format of the GIMP. Like Adobe's PSD, it stores all the editing data of an image project: layers, channels, paths, guides, selections, and text layers. It allows users to save their work-in-process and resume editing later non-destructively.
The format is a container for a hierarchy of image structures. Since GIMP 2.10 (2018), XCF supports high bit depth (up to 32-bit floating point) and zlib compression. Older versions were 8-bit only. Note that ImageMagick's support for XCF is often limited to flattening the image or extracting the composite preview.
Named after the XCF student group at UC Berkeley where GIMP was originally written.
DCX (Multi-page PCX)
A legacy multi-page image format created for PC-based fax software.
DCX is a multi-page bitmap image format that essentially acts as a container for multiple PCX files. It was developed by ZSoft Corporation, the same company that created PC Paintrush and the PCX format. The primary purpose of DCX was to serve as the file format for early digital fax software, allowing a multi-page document to be stored in a single computer file. Technically, a DCX file begins with a header containing a list of offsets (pointers) to the individual PCX images stored within the file. Each 'page' is a fully valid PCX image with its own header and palette. The format relies on the simple RLE (Run-Length Encoding) compression inherited from PCX, which is efficient for simple black-and-white fax documents but poor for complex photographs.
A DCX file consists of a 4-byte signature (987654320) followed by an array of up to 1024 32-bit integer offsets. Each offset points to the start of a PCX image structure within the file. The list ends with a zero (null) terminator. Because it is wrappers around PCX, it shares all the characteristics of that format: support from 1-bit monochrome up to 24-bit RGB color. However, since it was primarily used for faxing, the vast majority of DCX files encountered today are 1-bit black and white.
DCX became popular in the early 1990s alongside the rise of fax modems and software like WinFax. It allowed users to scan or 'print' a document to a fax driver, which would save the pages as a linear .dcx file before transmission. As PDF became the dominant document format and email replaced faxing, DCX faded into obsolescence.
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