Write first.
Everything else is here.

Getting started

Open a folder containing Markdown files to make it a workspace. Choose a document from the sidebar or create a new one, then type directly into the rendered page.

Munin saves plain .md files in the folder you chose. There is no import step, library database or proprietary document format.

Rendered and source views

Use the view control in the titlebar to switch the current document between rendered Markdown and editable raw source. Both are editing modes—not a preview pane.

Munin keeps your position as you switch, so you can inspect or edit the source and return to the same place in the rendered document.

Folders and workspaces

Each open folder appears as a tab in the titlebar. Use the + button to open another workspace and move between projects without opening another window.

Munin adds no index, vault metadata or sidecar files to your folders. They remain ordinary folders that work with Finder, Git, iCloud Drive and Dropbox.

Formatting and blocks

Select text to open the formatting bar. It provides headings, bold, italic, strikethrough, inline code, links, lists, quotes and code blocks without making you remember syntax.

Move the pointer beside a blank line to reveal the + control for inserting an image, table, code block, separator, task list or diagram.

Finding things

Press ⌘ F to find and replace within the current document. Workspace search finds matching content across every Markdown file in the open folder.

The outline rail maps the document’s headings. Expand it into a table of contents and select a heading to move directly to it.

Rich Markdown

Paste or drag images into a document and Munin saves them alongside your files. Mathematical notation is rendered with KaTeX, and fenced Mermaid blocks become diagrams.

Tables, task lists, syntax-highlighted code, footnotes and standard Markdown links remain ordinary source underneath the rendered page.

Writing tools

Focus Mode dims everything outside the current passage. Typewriter Mode keeps the active line near the centre of the window. Both are available from the View menu.

Line numbers map to the original Markdown source even in rendered mode. Spell checking and the editor’s theme can be changed from the app’s menus and settings.

Exporting

Choose File → Export as HTML… to create a self-contained web document, or File → Export as PDF… for a paginated copy suitable for sharing or printing.

External changes

If Git, an AI agent or another editor changes an open file, Munin loads the new version while preserving your cursor and scroll position.

When an external write displaces unsaved local text, Munin preserves that text through macOS file versions rather than silently discarding it.

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