The Markdown Timeline — a brief history
From plain-text prehistory through Gruber and Swartz's 2004 release to CommonMark, GitHub, and the AI era: how markdown quietly took over the world.
The Markdown Timeline
How a 2004 Perl script for bloggers became the default format of the internet. (Primary sources for most of this: the canon.)
1970s–90s · plain-text prehistory. Email and Usenet culture invents the conventions markdown would formalise: *asterisks* for emphasis, indentation for quoting, dashes for lists. People were writing proto-markdown before it had a name.
1991–2002 · the ancestors. setext brings structured plain text to email newsletters; Aaron Swartz's atx (2002) contributes the
# heading. Textile and reStructuredText explore the same territory.2004 · Markdown. John Gruber, with Swartz as collaborator and first user, releases Markdown: a syntax and a Perl script, guided by one principle: the source should be readable as-is. The spec fits on one page. This turns out to matter more than any feature.
2005–2012 · the web adopts it. Reddit, then GitHub and Stack Overflow (both 2008), make markdown the way millions write daily — READMEs, comments, questions. GitHub's dialect (GFM) adds tables and task lists and becomes the working standard. Markdown stops being a tool and becomes a habit.
2014 · the standardisation drama. A decade of ambiguity ("is this a list?") prompts Standard Flavored Markdown — renamed CommonMark after Gruber objects. John MacFarlane's rigorous spec becomes the foundation most implementations build on. "Simple" turns out to take hundreds of pages to pin down; users notice nothing, which is the point.
2015–2020 · the tools era. Static site generators (Jekyll, Hugo) make markdown folders into websites. Notion speaks it at the edges; Bear, Typora and iA Writer polish the writing experience; Obsidian (2020) proves a serious knowledge tool can be just markdown files, and win precisely because of it.
2022 · AI speaks markdown. ChatGPT launches and answers in markdown; every AI since does too. Trained on a markdown web and needing a token-cheap structure, AI makes markdown the native format of the era, arguably the biggest boost since GitHub.
2024–now · convergence. Google Docs adds real markdown import/export. WhatsApp expands its formatting. iPad Notes breaks Apple's holdout streak.
llms.txt proposes markdown as the web's AI-facing layer. The world is converging on markdown, mostly without announcements.The pattern across two decades: markdown wins not by adding features but by being the smallest thing everyone can agree on: readable, portable, pluggable, and owned by no one. Where it goes next: the manifesto has our bet.
Note
Dates and details welcome corrections: file an issue. A more visual version of this timeline is planned.
