Markdown to HTML Converter
Convert Markdown to clean, XSS-safe HTML with a live preview. Powered by marked and sanitized with DOMPurify. Download a standalone .html file. All in your browser.
Preview
HTML source
Markdown rendering by marked (MIT) and HTML sanitization by DOMPurify (Apache-2.0/MPL-2.0), both self-hosted.
How to use this tool
- Type or paste Markdown in the input box.
- Watch the live, sanitized preview update.
- Copy the HTML source or download it as an .html file.
Render Markdown into clean HTML with a live preview as you type. The output is sanitized with DOMPurify so any embedded scripts or dangerous attributes are stripped, making it safe to paste into a website or CMS. Download the result as a standalone .html document. Nothing is uploaded.
How it works
The Markdown to HTML Converter takes Markdown-formatted text and converts it to clean, well-structured HTML in real time. As you type or paste Markdown in the input panel, the rendered output updates instantly in the preview panel on the right. The HTML is sanitized with DOMPurify to remove any potentially dangerous tags or attributes, making it safe to embed in web pages.
When you are ready, click Download to save a standalone .html file that includes minimal inline styles and is ready to open in any browser. This is useful for publishing Markdown documentation, blog posts, or README files as web pages without a build tool or static site generator.
The converter uses the marked.js library, which supports standard CommonMark syntax including headings, bold, italic, links, images, code blocks, blockquotes, and ordered and unordered lists.
Because the conversion happens in your browser, no text is sent to any server. This makes it suitable for converting private documents or internal documentation.
Worked example
Convert a README file to a standalone web page
- Open your README.md in a text editor and copy all the content.
- Paste it into the Markdown input panel.
- Check the live preview to confirm headings, code blocks, and links look correct.
- Click Download HTML.
- Open the downloaded .html file in a browser or upload it to a web server.
A standalone .html file that renders your README as a formatted web page, no build tools required.
Common mistakes to avoid
- Pasting raw HTML into the Markdown input expecting it to render -- Markdown input is parsed as Markdown first, so raw HTML tags may appear escaped or distorted.
- Forgetting a blank line before a list or code block, which prevents the parser from recognizing the block-level element and collapses it into the preceding paragraph.
- Assuming all GitHub Flavored Markdown extensions work identically -- verify the preview before relying on the output for production use.
Key terms
- Markdown
- A lightweight plain-text formatting syntax where symbols like # for headings and ** for bold are converted to HTML by a parser.
- XSS (Cross-Site Scripting)
- A security vulnerability where malicious scripts are injected into web pages; DOMPurify sanitization prevents this in the converted HTML.
- DOMPurify
- A JavaScript library that strips dangerous HTML elements and attributes from a string, producing safe HTML for embedding in web pages.
Frequently asked questions
- Is the HTML safe to use?
- Yes — the rendered HTML is passed through DOMPurify, which removes scripts and unsafe attributes to prevent XSS.
- Is my Markdown uploaded?
- No — both rendering (marked) and sanitization (DOMPurify) run entirely in your browser.