What is the ALL file format?
The .all extension, in the context of Corel WordPerfect, identifies a General Printer Information File - a binary resource file used by WordPerfect's print engine on DOS and early Windows systems. These files were introduced during the WordPerfect 5.x era (late 1980s) and carried forward into the 6.x line.
A .all file stores printer-specific data that WordPerfect needed to communicate with a wide range of dot-matrix and laser printers, before Windows abstracted printer communication through its own driver model. The binary structure holds paper size definitions, font metrics, print capability flags, and hardware configuration tables for a particular printer or class of printers. Files typically range from 40 KB to 290 KB.
Companion files in the WordPerfect printer system include .prs (printer resource) and .wpt (template) files, as well as the word processor's native .WPD document format.
With the shift to Windows 95 and later, WordPerfect adopted the Windows native printer driver model, making .all files obsolete. Modern versions of Corel WordPerfect Office no longer use them.
The .all extension is also reused by completely unrelated software. Steinberg Cubase uses .all for song and arrangement project files - a different binary format with no relation to the WordPerfect printer resource.
Security & safety
RISK: LOWBoth WordPerfect .ALL and Cubase .ALL are data files that do not execute. They pose no direct security risk. Old WordPerfect printer .ALL files from untrusted sources are harmless if you simply ignore them; they are not executables.
Format details
in a nutshell- Steinberg Cubase/Cubasis Song File - Cubase (music production DAW) uses .ALL for arrangement/song files containing MIDI and audio track data - a completely different binary format from WordPerfect .ALL.
- Generic 'All Files' wildcard - Some programs use .ALL as a generic extension for compiled resource bundles or patch data (e.g. various games).
Programs that open ALL files
Windows2 apps
Corel WordPerfect Office
Paid WordPerfect printer configuration files are managed internally by WordPerfect's print setup; not opened manually by users. 
Cubase (Steinberg) - for Cubase .ALL files only
Paid File > Open > select the .ALL file (legacy Cubase song format). Newer Cubase versions may prompt to convert to current format. 
macOS1 app
Cubase (Steinberg) - for Cubase .ALL files only
Paid File > Open > select the .ALL file. macOS version of Cubase handles legacy .ALL song files. Technical details
deep spec| Format type | Binary printer driver/resource data file |
| Byte order | Little-endian |
| Container | Proprietary WordPerfect printer resource container |
| Typical file size | 40 KB - 290 KB |
| File signature | None documented; no standard magic bytes |
| Internal version | Varies by WordPerfect generation (5.x vs. 6.x) |
| Structure | Monolithic binary; contains paper sizes, font metrics, print capability flags, and device configuration |
| Associated OS | MS-DOS; Windows 3.x, 95, 98 |
| MIME type | application/octet-stream (no registered MIME type) |
| Related files | .prs (printer resource), .wpt (template), .wpd (document) |
| Developer | Corel Corporation (originally WordPerfect Corporation) |
| Superseded by | Windows native printer driver model (WHQL-certified drivers) |
| Released | late 1980s / early 1990s (WordPerfect 5.x / 6.x era) |
ALL conversions
Community Q&A
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