Open Markdown files made in other apps

Yes. Unmarked opens any standard Markdown file written in another editor, as long as it's a regular file on your Mac. No import, no conversion. It opens the file in place, so you can keep using your other tools on the same file.

Markdown is plain text. A .md file written in one app is the same file in every other app. Unmarked treats it that way: it reads the file where it sits and writes back to that same file. Nothing copied, nothing locked.

Open a file from another editor

1. In Unmarked, choose File ▸ Open (⌘O).
2. Pick the .md, .markdown, or .txt file you made elsewhere.
3. It opens rendered, in Read mode. Press ⌘E to switch to Write mode.

Or open it from the Finder: right-click the file, choose Open With ▸ Unmarked. To make Unmarked the default for a file, select it in the Finder, press ⌘I, set Open with to Unmarked, and click Change All.

Unmarked opens .md, .markdown, .mdown, .mkd, and plain .txt. It reads CommonMark plus the common GitHub extensions (tables, task lists, strikethrough) and YAML frontmatter, which most editors produce.

You can keep using your other tools

Opening a file in Unmarked doesn't claim it. The file stays a normal file in its normal place. Edit it in Unmarked, then open the same file in your other editor later, or the other way around. A sync service counts as one of those tools: leave the file in its iCloud Drive or Dropbox folder and it keeps syncing while Unmarked edits it in place.

Files written on Windows open fine too. Unmarked detects and preserves the text encoding and line endings, so a Notepad file round-trips unchanged rather than getting rewritten.

If part of a file looks off

A file from another app may lean on a Markdown feature Unmarked doesn't render yet.

Remote images, the kind linked from a https:// web address, show as their alt text. Unmarked has no network access, so it can't fetch them. Local images stored next to the file render normally.

Footnotes ([^1]) and math ($…$) appear as plain text. See what's not rendered yet for the full list.

None of this touches the text. It only changes how those parts display, so save and the file keeps everything it came with.