MUSE vs OPML
A detailed comparison of Emacs Muse and OPML Outline — file size, quality, compatibility, and which format to choose for your workflow.
Emacs Muse
Documents & TextEmacs Muse is a publishing environment for GNU Emacs that allows authoring documents in a simple markup and exporting to multiple formats. It supports LaTeX, HTML, Texinfo, and PDF output from a single plain text source.
About MUSE filesOPML Outline
Documents & TextOPML (Outline Processor Markup Language) is an XML format for structured outlines and lists. It is most widely used for exchanging RSS feed subscription lists between podcast apps and feed readers, and for hierarchical note-taking.
About OPML filesStrengths Comparison
MUSE Strengths
- Simple authoring markup.
- Multi-format export.
- Emacs-native.
OPML Strengths
- Standard RSS subscription interchange format.
- Simple XML — easy to parse and generate.
- Highly extensible via arbitrary attributes.
- Supported by every major outline and RSS tool.
Limitations
MUSE Limitations
- Superseded by Org-mode.
- Tiny ecosystem.
- No active development.
OPML Limitations
- XML verbosity — larger than a JSON-based equivalent.
- Specification is loose — different tools disagree on edge cases.
- Primary use (RSS reading) has shrunk dramatically since Google Reader.
- No strong central stewardship.
Technical Specifications
| Specification | MUSE | OPML |
|---|---|---|
| MIME type | text/x-muse | text/x-opml |
| Extension | .muse | .opml |
| Native editor | GNU Emacs | — |
| Status | Deprecated | — |
| Format | — | XML with nested <outline> elements |
| Standard | — | OPML 2.0 (2006) |
| Primary use | — | RSS subscription interchange |
Typical File Sizes
MUSE
- Short article 2-30 KB
OPML
- Typical RSS reader export (50 feeds) 5-30 KB
- Deep outline (Scrivener novel plan) 20-200 KB
Ready to convert?
Convert between MUSE and OPML online, free, and without installing anything. Encrypted upload, automatic deletion after 60 minutes.
Frequently Asked Questions
MUSE (Emacs Muse) 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.
MUSE (Emacs Muse) is a document formato used to store paginated text, com optional formatoting, tables, images, hyperlinks, headers e footers. It sits no documents & text family e is tipicamente associated com a specific office suite ou publishing pipeline that defined the formato e ships the canonical reader.
Modern office suites — Microsoft Word, Google Docs, LibreOffice Writer, Apple Pages — open most MUSE files with reasonable fidelity. If your installed software does not support MUSE, 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 — abrir most MUSE arquivos com reasonable fidelity. If your installed software does not support MUSE, converter to DOCX ou PDF first usando KaijuConverter; both abrir in virtually every reader, including grátis online viewers.
Upload the MUSE 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 MUSE (frames, legacy macros) may flatten to static content in the target format.