Markdown Preview & Markdown to HTML Converter
This free Markdown previewer renders Markdown as formatted HTML in real time as you type — headings, bold and italic text, lists, links, code blocks, tables, and blockquotes all appear instantly beside your source. You can also copy the generated HTML, making the tool a quick Markdown to HTML converter for blog posts, CMS content, and email templates.
Rendering happens locally in your browser using the CommonMark-compatible marked parser, and the preview is sanitized with DOMPurify so pasted content cannot run scripts. Your writing never leaves your device.
How to use Markdown Preview
- Type or paste Markdown into the left panel.
- Watch the rendered preview update live on the right.
- Press the copy button to copy the generated HTML for use in a CMS, blog engine, or email template.
Markdown syntax quick reference
# Heading 1 ## Heading 2 **bold** *italic* `inline code` - Bullet list item 1. Numbered item [Link text](https://example.com) > Blockquote ``` code block ```
Why Markdown?
Markdown lets you write structured documents in plain text: readable in its raw form, versionable in Git, and convertible to clean HTML. It has become the standard for README files, documentation sites, GitHub issues, and static site generators — and previewing while you write catches formatting mistakes (a missing blank line, an unclosed code fence) before you publish.
Related terminology
- Markdown
- A lightweight plain-text markup language created in 2004, designed to be readable as-is and convertible to HTML.
- CommonMark / GFM
- CommonMark is the standardized Markdown specification; GitHub Flavored Markdown (GFM) extends it with tables, task lists, and strikethrough.
- Code fence
- Triple backticks that open and close a code block, optionally tagged with a language name.
- Sanitization
- Filtering generated HTML to remove scripts and dangerous attributes before display — this preview sanitizes with DOMPurify.
Frequently asked questions
- How do I convert Markdown to HTML?
- Paste your Markdown into the editor and press the copy button next to the preview — the clipboard receives the generated HTML, ready for your CMS or template.
- Which Markdown features are supported?
- The standard CommonMark set: headings, emphasis, lists, links, images, blockquotes, inline code, and fenced code blocks, plus common extensions like tables.
- Is the preview safe if I paste untrusted Markdown?
- Yes. The rendered HTML is sanitized with DOMPurify before display, which strips script tags, event handlers, and other executable content.
- Why does my list or code block render wrong?
- The usual causes are a missing blank line before the list or fence, inconsistent indentation, or an unclosed ``` fence. The live preview makes these easy to spot and fix.