Markdown to HTML Converter — Online & Free
Write Markdown on the left, see clean HTML on the right. Supports GitHub Flavored Markdown with tables, task lists, code blocks, and more. All processing happens in your browser.
What Is Markdown?
Markdown is a lightweight markup language created by John Gruber in 2004. It lets you write formatted text using a plain-text syntax that is easy to read and write. The design goal was to create a format that is as readable as possible in its raw form, while still convertible to structurally valid HTML.
Instead of wrapping text in HTML tags like <strong> or <em>, you use simple punctuation: asterisks for emphasis, hash signs for headings, and dashes for lists. This makes Markdown ideal for writing content in any text editor, from Notepad to Vim, without needing to remember complex tag syntax.
Why Convert Markdown to HTML?
Markdown is great for writing, but the web speaks HTML. Every blog post, documentation page, email template, and CMS article ultimately needs to be rendered as HTML in a browser. Converting Markdown to HTML bridges the gap between human-friendly authoring and machine-friendly presentation.
Common reasons developers and writers convert Markdown to HTML include:
- Publishing blog posts: Write in Markdown, convert to HTML for your static site generator or CMS
- Documentation: README files and docs are written in Markdown but displayed as HTML on GitHub, GitLab, or your docs site
- Email templates: Many email builders accept HTML but not Markdown; convert once and paste
- CMS import: Importing content into WordPress, Ghost, or other platforms that expect HTML
- Prototyping: Quickly draft formatted content without wrestling with HTML tags
Supported Markdown Features
This converter uses marked.js with GitHub Flavored Markdown enabled, which means it supports everything in the CommonMark specification plus popular GitHub extensions:
- Headings: Six levels using
#through###### - Emphasis: Bold with
**text**or__text__, italic with*text*or_text_ - Lists: Ordered (numbered) and unordered (bulleted) lists with nested support
- Links and images: Standard
[text](url)andsyntax - Code: Inline code with backticks, fenced code blocks with triple backticks and optional language hints
- Tables: GFM-style tables with alignment syntax
- Task lists: Checkboxes with
- [ ]and- [x] - Blockquotes: Nested quoting with
> - Horizontal rules: Three or more dashes, asterisks, or underscores
- Strikethrough:
~~text~~for deleted text - Autolinks: URLs automatically converted to clickable links
Frequently Asked Questions
Is this Markdown converter free?
Yes, completely free. No signup, no usage limits, no watermarks. Everything runs in your browser.
Does this tool send my data to a server?
No. All Markdown parsing and HTML generation happens 100% client-side in your browser using JavaScript. Your content never leaves your machine.
What is GitHub Flavored Markdown (GFM)?
GFM is a set of extensions to standard Markdown created by GitHub. It adds support for tables, task lists, strikethrough text, autolinks, and disallows raw HTML for security. Most modern Markdown tools support GFM by default.
What does the Sanitize option do?
When enabled, the tool uses DOMPurify to strip potentially dangerous HTML (such as script tags and event handlers) from the output. This is recommended when converting untrusted Markdown. For your own content, you can disable it to preserve raw HTML.
Can I download the HTML output?
Yes. Click the Download button to save the generated HTML as a .html file. The downloaded file is a complete, self-contained HTML document ready to open in any browser.
Does this tool support custom CSS styling?
The live preview uses a clean, readable stylesheet inspired by GitHub's rendering. The downloaded HTML file includes the same styles inline, so it looks consistent when opened locally or embedded elsewhere.