Plain Markdown
Your words.
Your files.
Real .md files, in a folder you choose. A familiar format that keeps your writing yours.
Outerline
A native Markdown editor for Mac and iPhone. Carefully crafted for collecting ideas, finding connections, and giving your thoughts room to take shape. So you can just write.
Writing
Simple on the surface.
Infinite possibility.
Write freely, with a full set of tools within reach. Format visually, with controls right alongside your words on Mac and above the keyboard on iPhone. Prefer the keys? Mac keyboard shortcuts keep you moving. Follow your document’s outline, connect ideas with wikilinks, and see what links out and what leads back.
A single surface
Keep it in sync. From Mac to iPhone and back.
Your writing goes where you go, with the tools you rely on close at hand. Outerline feels at home on Mac and iPhone, with familiar features shaped for each screen. iCloud keeps your library in sync, so you can pick up your thoughts where you left them.
Built-in MCP
Bring your own assistant.
Outerline’s built-in MCP server gives your own AI assistant granular tools to read and revise drafts, search your library, organize your notes, and more. Connect through the CLI or our one-click Claude Desktop connector. AI integration is entirely opt-in, and you can turn off the MCP server at any time.
Share
Write for yourself. Publish when you’re ready.
Give your writing a home on the web with Outerline Publish. Choose the appearance, set access, and publish a link, all from the document you’re already working on. Share an idea, a guide, or a finished piece when you’re ready for others to read it.
Outerline Publish is available as a $1.99 monthly in-app subscription.
And the little things.
There’s more in the details.
Your words.
Made for Mac.
And iPhone.
A native home for your thoughts, thoughtfully designed for each screen.
One price.
Yours for good.
A one-time $9.99 universal purchase. Buy Outerline once and use it on Mac and iPhone.
Wikilinks.
Connect related notes and follow the links between your ideas.
Markup, for your Markdown.
Highlight and comment without changing your Markdown.
Split View.
Write and preview side by side, with your formatting rendered in real time.
Version history
Room to change
your mind.
Look back at earlier drafts and return to the words you want to keep.
Keep your flow.
Keyboard shortcuts put everyday actions at your fingertips.
A tag for that.
Find common threads across the notes in your library.