Muse File Format (.muse): What It Is and How to Open It

Muse at a glance#

Full name	Emacs Muse markup
File extension	.muse
Category	Documents
Compression	Uncompressed
FileFlip support	FileFlip reads and writes this format

What a .muse file can hold#

These are the things a Muse file either supports or does not, and they are what decides whether a conversion keeps everything or quietly drops something.

Selectable text	Yes
Human readable	Yes

Strengths and limitations of Muse#

What Muse does well

One source file publishes to HTML, LaTeX, and other targets without keeping separate copies in sync
Plain text with no special software needed to read it, in keeping with its Emacs-authoring roots
Lighter, less command-heavy syntax than the LaTeX it's often used to publish to

Where Muse falls short

Practically tied to Emacs; no mainstream editor outside Emacs understands the markup or its publishing styles natively
A much smaller ecosystem than Markdown or Org-mode, so tooling, editor support, and documentation are thin
Sees little active development, so it has fallen behind newer Emacs and general-purpose markups on features and support

Write in Muse when authoring inside Emacs and publishing the same document to more than one output format from a single source.

Convert Muse markup to another format when the document needs to leave Emacs, since almost nothing else reads it directly.

How to open a .muse file#

A .muse file opens in the programs below, grouped by the platform you are on. If you would rather not install anything, FileFlip converts Muse into a format your machine already opens, and it does it in the browser tab rather than on a server.

Platform	Programs that open it
Windows	Emacs
macOS	Emacs
Linux	Emacs
Web	FileFlip

Muse questions people ask#

What is a .muse file?

A .muse file is written in Emacs Muse, a lightweight markup for authoring documents inside Emacs that publish to HTML, LaTeX, and other formats from one source file. It predates most of today's lightweight markups and is closely tied to the Emacs text editor.

Do I need Emacs to open a Muse file?

A .muse file is plain text, so any text editor displays it, but only Emacs with the Muse mode installed understands the markup and can publish it to HTML, LaTeX, or another output format. Converting it to a mainstream document format is the practical way to read it elsewhere.

What's the difference between Muse and Org-mode?

Both are Emacs markup languages for writing plain text that publishes to multiple formats, but Org-mode, created in 2003, has a far larger and more active community and covers far more ground than authoring, including task management and literate programming. Muse remains a narrower, publishing-focused tool with a much smaller following.

Converting Muse files#

Every conversion runs inside your browser. The file is read from your disk, the work happens on your own machine, and nothing is uploaded. How FileFlip works names the engine behind each family and how to verify that for yourself.

Muse File Format (.muse)