What's new — and how to keep up
Markdown looks frozen in time, but its standards have a quiet, ongoing story. Here's what actually changes, and the short list of places worth watching.
Why "what's new" is even a question
Gruber's original 2004 description was deliberately loose — it explained the philosophy and gave examples, but left edge cases to each implementer's judgment. That freedom is why Markdown spread so fast, and also why the same document could render one way on a wiki and differently in another tool. Most of Markdown's "news" over the years has been the effort to tame that ambiguity without losing the simplicity.
The two names worth knowing
CommonMark is the closest thing Markdown has to an official standard. Launched in 2014 by a group including John MacFarlane (creator of the Pandoc converter) and Jeff Atwood (co-founder of Stack Overflow), it's a precise, unambiguous specification backed by a test suite of 500-plus cases. Its goal: any conforming parser produces the same output. It deliberately keeps its scope tight — headings, paragraphs, lists, links, images, emphasis, code, and blockquotes — and nothing fancier.
GitHub Flavored Markdown (GFM) is the dialect you meet most, given GitHub's scale. Formalized in 2017, it's a strict superset of CommonMark: every valid CommonMark document is valid GFM, and GFM adds a small set of extensions on top — most notably tables, task lists (- [ ]), strikethrough (~~text~~), and autolinks.
Markdown.pl, that converts it to HTML.text/markdown media type is registered with the IETF (RFC 7763 & 7764).The thing most "changes" come down to
When a tool says it supports "Markdown," it increasingly means CommonMark plus a few extensions of its choosing. So the practical question is never really "what's the latest version of Markdown?" — it's "which flavor does this tool speak?" Tables and task lists work on GitHub; paste them somewhere that only does plain CommonMark and they may show up as raw symbols. Even GitHub's own renderer adds things — alerts, math, diagrams, emoji shortcodes — that aren't in the formal GFM spec and won't travel elsewhere.
Where to actually keep up
You don't need to follow Markdown like the news. A handful of primary sources tell you everything that's real (skip the third-party summaries):