Corel WordPerfect 4 for Mac document file
File type: Document file
An SSIW file is a document created by Corel WordPerfect 4 for Mac, a word-processing application.
It contains the text and formatting of a WordPerfect document in the legacy Macintosh format.
File type category:
Document file
Date updated: September 27, 2026
The SSIW file extension is associated with Corel WordPerfect, a word-processing program developed by Corel. Corel WordPerfect is part of the Corel WordPerfect Office suite.
SSIW files contain documents created using Corel WordPerfect 4 for Mac. The format was intended for the Macintosh version of WordPerfect and may contain formatted text.
Corel WordPerfect Office and Corel WordPerfect for Microsoft Windows are later Windows products. Because SSIW is a legacy Macintosh format, current Windows editions may not open it directly.
Try opening an SSIW file with a version of Corel WordPerfect that supports WordPerfect 4 for Mac documents. The current version may still be able to open the file, although current Windows versions of Corel WordPerfect or Corel WordPerfect Office may not support this legacy Macintosh format directly.
If the file cannot be opened, use the original compatible Macintosh software or another compatible legacy version of WordPerfect.
If a compatible version of WordPerfect can open the file, use its Save As or export function to create a newer WordPerfect document or another format it supports.
Software applications that can open ssiw files:
Microsoft Windows
Software applications that handle other tasks involving ssiw files:
Microsoft Windows
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