Convert XCMD to PDF

If you need to share a legacy HyperCard command with someone who cannot run HyperCard, a PDF can preserve its readable source, documentation, or visible output. An XCMD is executable code, not a page document, so this process records information about it rather than preserving its behavior.

What an XCMD file contains

XCMD means external command: compiled code that adds commands to Apple HyperCard. An XCMD is commonly stored as a resource of type XCMD in a resource fork or HyperCard stack. Files with an .xcmd extension can vary, so check their source and contents instead of relying on the extension alone.

What PDF preserves

PDF stores fixed-layout pages for viewing, printing, and sharing. It can contain readable code, documentation, or an image of a command’s output, but it cannot retain executable behavior.

Make a PDF from available content

Readable source or documentation: Open the text in LibreOffice Writer, set code in a monospaced font, and check page breaks. Choose File → Export As → Export as PDF. If you have source code but no document, open the plain-text file in Writer or paste it into a new document before exporting.

Binary XCMD: There is no general-purpose converter that turns compiled XCMD code into a useful PDF or reconstructs its source. On a classic Mac, ResEdit can inspect resource types; it does not decompile an XCMD. Make a PDF from accompanying documentation or a written inventory of the file’s available details instead. Do not rename the binary to .pdf.

Visible output: In a compatible HyperCard environment, open the relevant stack and run the command only if you trust it. Use File → Print and a host PDF printer if the environment supports printing to the host. Otherwise, capture the relevant screen, insert the image into Writer with Insert → Image, then export the document as PDF. This records only the displayed result.

Compatibility and file identification

XCMDs may require classic Mac OS, a particular HyperCard version, or other resources, and may not run on current systems. Online converters cannot preserve executable behavior; avoid uploading unknown or proprietary binaries. If the file is actually .xmcd, it is a Mathcad worksheet, not a HyperCard XCMD; open it in a compatible Mathcad release and use that application’s print or PDF export function.