Markdown Library ML-42 is a native macOS app for reading and editing markdown files already on disk, across as many folders and projects as you want, for $12.99 once.
Typora is a cross-platform WYSIWYG markdown editor, where markdown syntax renders inline as you type with no separate preview pane, for $14.99 once on macOS, Windows or Linux.
| Question | ML-42 | Typora |
|---|---|---|
| Interface | A sidebar of your folders, the document, and an inspector with the table of contents and a summary, ready on launch | Seamless WYSIWYG editor: markdown syntax renders inline as you type, with no raw view by default |
| Storage model | Plain .md files in your existing folders; nothing added | Plain .md files too. A file tree and file-list panel open folders directly; no vault, no database |
| Works on existing folders and repos | Yes, that is the product | Yes. Open any folder, no import step |
| Reading and writing | Built for reading and browsing many files across many projects at once, with an edit mode for changes | Built for writing a document in a WYSIWYG editor, one file at a time |
| Platforms | macOS 26 or later, Mac only | macOS, Windows (including ARM) and Linux; no iOS or iPadOS |
| File watching and AI edits | FSEvents-based; reloads automatically when a file changes outside the app | Plain files, so agents can edit them. Built for writing one document, not watching a folder. |
| Export | Not export-focused; the files are already plain markdown on disk | Rich export: PDF with bookmarks, Word, LaTeX, EPUB, OpenOffice and MediaWiki |
| Rendering extras | Tables, syntax-highlighted code, embedded local images, YAML front matter shown as a property list | Tables, Mermaid diagrams, MathJax, code fences and custom CSS themes |
| Price | $12.99 once (introductory; it will rise) | $14.99 once, license covers up to 3 devices, 15-day free trial |
| Sync | None built in. Use whatever already syncs your folders | None built in either. Sync is whatever you already use for the folder |
| Track record | A new app | The most-mentioned markdown editor in tracked comparisons; updates have historically been infrequent |
| AI-agent workflow | Built for it. File watching reloads a file when an agent edits it; on-device summaries; search skips build and dependency folders | Files are agent-editable too; the app is built around writing one document |
| Learning curve | Small, by design: open a folder, read, edit | Small too. The editor is built to disappear |
What you see when you open each app
Open ML-42 and you are reading the folder you pointed it at straight away: a sidebar of folders and files, the document rendered as formatted markdown, and an inspector, with FSEvents watching for changes made anywhere else.
Open Typora and there is a document waiting for you to write in. Markdown syntax appears and disappears near the cursor as you type, with no preview pane and no raw view unless you ask for one. It is the most seamless WYSIWYG markdown experience available, and it is built around composing that one document. Browsing a folder of them is a different job.
The closest architecture in the field
This is a fair match: Typora opens plain .md files directly, with a file tree and file-list panel over any folder you point it at. No vault, no import, no database. ML-42 is built on the same architecture.
The two apps also share a price model most competitors do not: a one-time purchase instead of a subscription. Where they diverge is what happens once the folder is open. Typora hands you an editor for the document you are writing; ML-42 hands you a way to read and move between all of them.
Reading many files, writing one
ML-42 is built for browsing: many folders open side by side, one search across all of them, and the same window whether you are reading a README or a spec an AI agent just wrote. Typora is editor-first. It renders one document cleanly as you write it, and it is not built to be the tool you reach for to skim a dozen files across a repo.
The difference shows most when a file changes outside the app. ML-42 watches the files it is showing you with FSEvents and reloads automatically when an AI agent or another editor changes one on disk. Typora works on plain files, so agents can edit them, and it is built for writing one document, not watching a folder.
Where Typora wins
Typora runs on macOS, Windows and Linux, and its export options go well beyond anything ML-42 attempts: PDF with bookmarks, Word, LaTeX, EPUB, OpenOffice and MediaWiki, plus Mermaid diagrams, MathJax and custom CSS themes. If you need a single document to leave markdown behind in one of those formats, Typora is built for exactly that, and ML-42 is not trying to be.
ML-42 is a reader and editor for folders that exist for other reasons: repos, docs directories, agent context. If you are choosing an editor to compose documents in, Typora may simply be the better fit. ML-42 competes when the files already exist and need to stay where they are.
- You want to write markdown in a WYSIWYG editor and never see raw syntax.
- You work across macOS, Windows and Linux. ML-42 is Mac only.
- You need rich export to PDF, Word or LaTeX from a single document.
- Your files already live in folders you browse across many projects, and you are not composing one document.
- You want changes from AI agents or other editors to appear on their own as soon as a file changes on disk.
- You want a native Mac reader and editor for markdown that lives in repos and docs folders.
Also compare: Obsidian, iA Writer and Bear. All four side by side are on the home page.
Markdown Library ML-42
A native Mac reader and editor for the markdown in your repos and docs folders. No import, no vault.
Download on theMac App Store$12.99 once. Introductory price. It goes up later.