Brett Terpstra just shipped Marked 3. It’s the biggest update in the app’s history. After more than a decade of Marked, that’s impressive.
If you’ve never used it, Marked does one job. You write Markdown in whatever editor you like, and Marked shows you a live, rendered preview in its own window. Save the file and the preview updates on its own. It sounds small. It isn’t. Once you’ve written a long document this way, going back to an editor that can’t show you the finished page feels like working blind.
Version 3 is more than a point release. Two-way DOCX support means Marked can now move your writing in and out of Word. Brett added Custom Processors and Custom Rules for writers who want exact control over how their Markdown renders. There’s also a Style Stealer that copies the look of a site you write for, so your preview matches what your readers will actually see.
The list keeps going. Built-in Mermaid diagrams, full MathJax support, new CommonMark GFM and Kramdown processors, updated Scrivener live preview, EPUB export with custom CSS, new PDF options, and a speed reading mode.
Marked 3 ships with early bird pricing of $2.99 a month or $29.99 for the year. Brett also sells a permanent unlock for people who are done collecting subscriptions, and it’s included with Setapp. There’s a free seven-day trial on the Mac App Store and the direct Paddle version.
Brett has been building Mac tools for about as long as I’ve been writing about them. Marked is one of his best.

