MAN vs RST
A detailed comparison of Unix Man Page and reStructuredText — file size, quality, compatibility, and which format to choose for your workflow.
Unix Man Page
Documents & TextMan (manual) pages are the standard documentation format for Unix and Linux command-line tools, written in troff/groff markup. They follow a structured layout with NAME, SYNOPSIS, DESCRIPTION, and OPTIONS sections for consistent reference.
About MAN filesreStructuredText
Documents & TextRST (reStructuredText) is a lightweight markup language used in Python documentation.
About RST filesStrengths Comparison
MAN Strengths
- Universal Unix-like OS documentation since 1971.
- Plain text with simple troff markup — tiny files.
- Section system cleanly separates commands from APIs from config files.
- Renders to terminal, PostScript, HTML, or PDF.
- Every Unix programmer knows the format.
RST Strengths
- Rich directives for admonitions, code, math, and custom elements.
- Cross-references work within and across documents.
- Sphinx ecosystem offers best-in-class Python docs output.
- Standardized as part of Python PEP infrastructure.
- Plain text, version-controllable.
Limitations
MAN Limitations
- Terse by design — bad for tutorials or beginner-friendly intros.
- Troff syntax is arcane and difficult for modern authors.
- No interactive examples or live-editable snippets.
- Mostly replaced by web docs, cheat sheets, and --help output for modern tools.
RST Limitations
- Syntax denser than Markdown — higher learning curve.
- Less widely adopted than Markdown outside Python world.
- Multiple directive dialects (Sphinx, Docutils, custom) create fragmentation.
- MyST (Markdown + Sphinx) has pulled many Python projects toward Markdown.
Technical Specifications
| Specification | MAN | RST |
|---|---|---|
| MIME type | text/troff | text/x-rst |
| Extensions | .man, .1, .2, .3, .4, .5, .6, .7, .8 | — |
| Markup | troff / groff with mdoc or man macro package | — |
| Renderer | groff + less (terminal), groff → PostScript/PDF/HTML | — |
| First shipped | Unix First Edition (1971) | — |
| Extension | — | .rst |
| Toolchain | — | Docutils, Sphinx, Read the Docs |
| Encoding | — | UTF-8 |
| Related formats | — | MyST (Markdown + RST directives) |
Typical File Sizes
MAN
- Single command man page 2-15 KB
- Complex tool (e.g., bash man) 80-200 KB
RST
- API reference page 5-50 KB
- Sphinx project chapter 20-100 KB
- Full library documentation 500 KB - 10 MB
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Frequently Asked Questions
MAN (Unix Man Page) is a document format used to store paginated text, with optional formatting, tables, images, hyperlinks, headers and footers. It sits in the documents & text family and is typically associated with a specific office suite or publishing pipeline that defined the format and ships the canonical reader.
RST (reStructuredText) is a document format used to store paginated text, with optional formatting, tables, images, hyperlinks, headers and footers. It sits in the documents & text family and is typically associated with a specific office suite or publishing pipeline that defined the format and ships the canonical reader.
Modern office suites — Microsoft Word, Google Docs, LibreOffice Writer, Apple Pages — open most MAN files with reasonable fidelity. If your installed software does not support MAN, convert to DOCX or PDF first using KaijuConverter; both open in virtually every reader, including free online viewers.
Modern office suites — Microsoft Word, Google Docs, LibreOffice Writer, Apple Pages — open most RST files with reasonable fidelity. If your installed software does not support RST, convert to DOCX or PDF first using KaijuConverter; both open in virtually every reader, including free online viewers.
Upload the MAN to KaijuConverter and pick DOCX, PDF, ODT, RTF, HTML, Markdown, or plain text. Our pipeline runs LibreOffice headlessly plus pandoc for text formats — the same engines behind professional document pipelines. Styles, tables, images, and hyperlinks survive the conversion intact.
Yes, to a high degree. Standard fonts, headings, lists, tables, images, hyperlinks and page structure transfer cleanly. Custom fonts substitute to the closest match if not embedded; obscure layout features unique to MAN (frames, legacy macros) may flatten to static content in the target format.