Markdown, at your fingertips.
Write directly in Markdown with native text selection, Find, familiar formatting shortcuts, and Undo. The source stays yours.
Asterdown / Features
Your writing, in perspective.
From the first outline to the final paragraph, keep your writing close and the tools within reach.
Room for your next idea.
From the first outline to the final paragraph, keep your writing close and the tools within reach.
A workspace that feels like home.
Open a real folder. Move between document tabs, jump to a heading, or find a phrase across your workspace.
See the shape of your words.
Switch between source, split view, and preview. Tables, highlighted code, math, and Mermaid diagrams bring a document into focus.
Ordinary files. Lasting freedom.
Save standard Markdown files in folders you choose. Keep working with Finder, Git, and the other tools you already use.
Give your images a place.
Paste or drag images into local assets. Inspect references and run upload, download, or migration tasks with providers you configure.
Settle into your own rhythm.
Choose light, dark, or system appearance, with six accent options. The editor and preview share a coordinated palette.
Markdown with room to grow.
CommonMark and GitHub Flavored Markdown form the foundation. Choose Standard, GitHub, or Typora profiles for the extensions your document needs.
Everyday writing
- Headings & paragraphs
- Lists & task lists
- Block quotes
- Bold, italic & strikethrough
- Links & images
Technical documents
- Fenced & inline code
- Tables
- Front Matter recognition
- Math with KaTeX
- Mermaid diagrams
Profile extensions
- Footnotes & GitHub alerts
- Known emoji shortcodes
- Bare URL links
- Highlight, subscript & superscript
- Table of contents
Extensions vary by profile. Preview supports a sanitized subset of HTML; full compatibility with other editors is not promised. Front Matter is recognized in the source and omitted from preview.