What Is the Markdown Preview Tool?
The Markdown Preview tool is a free online split-pane editor that lets you write Markdown on the left and see the rendered output on the right in real time. It supports GitHub Flavored Markdown (GFM), including tables, task lists, strikethrough, and fenced code blocks.
Whether you are drafting a README for a GitHub repository, writing documentation, composing a blog post, or learning Markdown syntax, this tool gives you instant visual feedback as you type.
How to Use the Markdown Preview Editor
- Type or paste your Markdown content in the editor pane on the left. The preview pane on the right updates automatically as you type.
- Use the formatting toolbar at the top to insert bold, italic, headings, links, images, code blocks, and lists without memorizing syntax.
- Click Export HTML to download the rendered output as a standalone HTML file with clean styling.
- Click Copy MD to copy your raw Markdown text to the clipboard.
- Expand the Markdown Cheat Sheet at the bottom for a quick reference of all supported syntax.
Supported Markdown Features
This editor supports the full CommonMark specification plus GitHub Flavored Markdown extensions. You can use headings (h1 through h6), bold, italic, and strikethrough text, ordered and unordered lists, blockquotes, horizontal rules, inline code and fenced code blocks, links, images, tables with alignment, and task list checkboxes.
Tips for Writing Better Markdown
- Use headings hierarchically: start with h1 for the title, h2 for sections, h3 for subsections
- Leave a blank line between paragraphs and before/after lists for proper rendering
- Use fenced code blocks with a language identifier for syntax highlighting in supported renderers
- Preview your content frequently to catch formatting issues early
- Use the toolbar buttons to learn the syntax for elements you use less often
Common Use Cases
- Writing and previewing GitHub README files before committing
- Drafting documentation or technical writing in Markdown
- Composing blog posts for static site generators like Hugo, Jekyll, or Astro
- Learning Markdown syntax with instant visual feedback
- Converting Markdown to HTML for embedding in websites or emails