I've been writing technical documentation for about ten years now. I've used Framemaker, Word, Google Docs, Confluence, and about a dozen other tools that promised to solve documentation forever. None of them stuck. Markdown did. Here's why.

It Lives in Your Repository

This is the big one. Your documentation lives right alongside your code. When someone makes a pull request that changes a feature, the documentation update is right there in the same PR. You review them together, merge them together, deploy them together.

I cannot overstate how much cleaner this makes things compared to having docs in a separate tool. In Confluence, docs get outdated within a week because nobody remembers to update them separately. Keep the README.md next to the source code and it stays current because the developer who changed the code is the same person updating the docs.

Plus, markdown files diff beautifully. You can see exactly what changed in a documentation file, who changed it, and when. Try doing that with a Word document.

Zero Vendor Lock-In

Markdown files are plain text. They don't belong to any company or platform. You can open them in VS Code, Vim, Notepad, or any of the dozen editors I compared recently. Switch from GitHub Pages to GitBook to a static site generator — your .md files stay exactly the same.

I migrated a documentation site from one static site generator to another last year. The templates changed, the config changed, the deployment pipeline changed. The markdown files? I copied them over verbatim. It took about 20 minutes for 200 files.

Compare that to migrating from Confluence to anything. It's a nightmare. You export XML, parse it, clean up the formatting mess, and still end up with half your tables broken and your images missing.

The Tooling Ecosystem Is Mature

Markdown has been around for over twenty years. The tooling around it is incredibly mature. There are linters, formatters, spell checkers, previewers, and static site generators — all battle-tested.

You can turn a folder of markdown files into a full documentation site with tools like Docusaurus, MkDocs, or Next.js. You can generate PDFs, ebooks, or even slide decks from the same files using Pandoc. The ecosystem is massive and everything works together because they all agree on the same base format.

It Forces Good Structure

This is something I didn't appreciate until I'd been using markdown for a while. Because markdown has a limited set of formatting options, you're forced to think about structure instead of visual design. There's no way to make a heading slightly bigger or change the font color. You just have H1, H2, H3, and so on.

This constraint is actually liberating. You focus on what you're saying, not what it looks like. And the end result is more consistent because all your headings follow the same hierarchy.

The Specific Things Developers Need

Markdown handles developer-specific content better than any rich text editor. Code blocks with syntax highlighting work natively. Inline code is easy to type. Tables format cleanly in source. Links to API references, issue trackers, and related code files are straightforward.

And then there are the extras. With a good markdown editor like MDtoTEXT, you can embed Mermaid diagrams to document architecture, LaTeX math for algorithmic explanations, and task lists for tracking progress — all in the same plain text file.

When Markdown Doesn't Work

I should be honest about the downsides too. Markdown isn't great for documents that need precise visual control. If you're designing a product specification with specific layout requirements, you'll struggle. The table syntax is clunky for anything complex. And there's no standard way to include cross-references or conditional content.

For those cases, you might want a dedicated documentation platform or a richer format. But for the vast majority of technical documentation — API docs, README files, contribution guides, architecture overviews — markdown is the right choice.

The Bottom Line

I've seen a lot of documentation tools come and go. Markdown has outlasted every single one because it solves the fundamental problem: it's text, it's portable, and it doesn't belong to anyone. If you're starting a new project or migrating old documentation, write it in markdown. Your future self will thank you when you switch platforms in three years.

And if you need a solid editor that handles diagrams, math, and code highlighting, MDtoTEXT does all of that without tracking a thing you write.