What Is Markdown, and How Do You Preview It Live?

READMEs, chat apps, blog editors and documentation tools all use Markdown — a way to format text using plain, typed symbols instead of clicking bold/italic buttons.

What Markdown syntax looks like

A few characters do most of the work:

# Heading and ## Subheading — headings, by number of # symbols.
**bold** and *italic* — text emphasis.
- item or 1. item — bullet or numbered lists.
[link text](https://example.com) — a hyperlink.
`code` — inline code, and triple backticks for a full code block.

The appeal is that it's readable even in its raw, unrendered form — unlike, say, raw HTML — while still converting into properly formatted output.

Why Markdown is so widely used

It's fast to type without reaching for a mouse, it's plain text so it works in any text editor and stores cleanly in version control, and nearly every developer tool, chat platform and blogging system supports rendering it, making it a practical shared standard rather than a one-off proprietary format.

Why previewing matters

Markdown's downside is that the raw syntax and the rendered output look quite different — a heading, a list, or a link is easy to get subtly wrong (a missing space after #, mismatched brackets in a link) without noticing until you see it rendered. Previewing live, side by side with what you're typing, catches these mistakes immediately instead of after publishing.

How to preview Markdown live

Open the Markdown Previewer, type or paste your Markdown, and see it rendered live side by side. Export the result as HTML or Markdown when you're done.

A quick example

## Features
- Fast
- **Free**
- No sign-up

renders as a heading followed by a bullet list, with "Free" shown in bold — exactly what you'd expect from reading the raw syntax once you know the symbols.

FAQ

Does Markdown syntax work the same everywhere? The core syntax (headings, bold, lists, links) is consistent almost everywhere, but some platforms support extensions (like tables or task lists) that others don't — check the specific platform if you're using anything beyond the basics.

Can I convert my Markdown into a Word document or PDF? This tool exports to HTML or Markdown directly; from HTML, most word processors can open or paste in formatted content.

Is Markdown case-sensitive? The syntax symbols themselves aren't about case, but headings, links and other elements are otherwise treated as plain text — case only matters for the actual words you write, not the formatting symbols.

Preview Markdown now

Try the free Markdown Previewer — live side-by-side rendering. See more productivity tools.