CWK vs RTF: ClarisWorks / AppleWorks vs Rich Text Format
Compare Apple's proprietary ClarisWorks / AppleWorks (.cwk) integrated office format with Microsoft's cross-platform Rich Text Format (.rtf).
ClarisWorks / AppleWorks (.cwk) was the beloved all-in-one productivity suite for classic Mac OS and Windows throughout the 1990s and early 2000s, bundling word processing, spreadsheets, and databases. RTF is a text-based interchange standard supported across virtually every text editor in existence.
| FEATURE | CWK | RTF |
|---|---|---|
| Format Type | Compound binary document / MacBinary container | Plain text control-word markup |
| Original Developer | Claris Corporation / Apple Inc. | Microsoft Corporation |
| First Released | 1991 (ClarisWorks 1.0) | 1987 (RTF 1.0) |
| Platform Affinity | Classic Mac OS, Mac OS X, Windows | Universal / Cross-platform |
| Character Encoding | Mac OS Roman (legacy) or UTF-8 (AppleWorks 6) | ASCII with \u and \' ANSI escape sequences |
- Seamless integration of text, vector graphics, spreadsheets, and databases in a single document
- High typographic fidelity on classic Mac OS with QuickDraw fonts
- MacBinary encapsulation preserved Mac OS Roman resource and data forks
- Compact binary serialization optimized for early Macintosh hardware
- Human-readable ASCII/Unicode control-word syntax
- Universal interoperability across Windows, macOS, Linux, and mobile
- Open specification with widespread converter and library support
- Zero dependency on obsolete proprietary binary runtime frameworks
RTF remains the premier document interchange standard, while CWK documents hold decades of irreplaceable legacy Mac archives. convrtr recovers text, lists, and formatting from both formats into clean GitHub Flavored Markdown locally with zero cloud exposure.
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