Adobe PageMaker add-in file
File type: Plugin, addon file
An alh5 file is an add-in or plug-in file used by Adobe PageMaker desktop publishing software.
It contains data that extends or enhances PageMaker's functions.
File type category:
Plugin, addon file
Date updated: October 7, 2026
Record marked as obsolete and not updated for a long time.
The alh5 file extension is associated with the Mac version of Adobe PageMaker, Adobe's desktop publishing software.
An alh5 file contains add-in or plug-in data that enhances the application's functions. It is a supporting file for PageMaker rather than a document intended for independent use.
Adobe PageMaker, formerly Aldus PageMaker, is obsolete and discontinued software. The format is therefore no longer in regular use.
An alh5 file was designed to be used by the Mac version of Adobe PageMaker. It is not normally opened directly; place it where PageMaker can load its add-ins or plug-ins.
Because PageMaker is obsolete and discontinued, a compatible legacy Mac installation may be required.
An alh5 file is a PageMaker add-in or plug-in, not a document format, so it cannot be meaningfully converted to a common document format.
If the goal is to preserve a PageMaker publication, open the publication in compatible PageMaker software and export or print the publication from there. The add-in itself generally has no practical conversion path.
Software apps that import alh5 files:
Apple macOS / Mac OS X
Software applications that handle other tasks involving alh5 files:
Apple macOS / Mac OS X
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