A viewer and editor for the documents you keep, on macOS, Windows and Linux. Warm cream stock, a serif at a fixed reading measure, and GitHub-flavored rendering done entirely offline. No network, no telemetry, no account.
macOS, Windows and Linux, on x64 and ARM64. Needs bun on PATH.
The Example page in the folder box is the reference sheet. Three task states, five alerts, typed Fez blocks, and a live gallery of every Fez component you have installed.
A :::info block is not a special case in the lexer. It is an ordinary Fez component, with a file on disk you can open, change, or replace. The three that ship with the app are the start of that folder, not a closed list.
Every part of it answers a question a markdown reader actually runs into.
Default is the original paper-like reading layout. Compact fits more on screen with smaller chrome and document text, tighter line spacing, reduced page padding, and denser code blocks and tables. Pick the style and the colour mode independently; ⇧⌘D changes only light and dark, so Default stays Default and Compact stays Compact. Body text is held to 7:1 contrast against its own background by the test suite.
On Windows and Linux read ⌘ as Ctrl and ⌥ as Alt. The pane numbers follow the window: files, preview, raw, notes.
No administrator, no installer, nothing added outside your home folder except /Applications/MdBoss.app on macOS. The script checks the release checksum and tells you if bun is missing.
macOS and Linux
Windows, in PowerShell
Uninstall with the same script plus --uninstall. The config folder is left alone.
A hammer file over bun and cargo. Needs bun and a Rust toolchain; the shell is a thin native window, everything else is TypeScript.