Markdown to HTML — Free Online Tool
Write or paste Markdown and see the rendered HTML output in a sandboxed live preview side-by-side. The HTML is sanitized with DOMPurify before rendering, so XSS payloads in the Markdown are neutralized. Download the raw HTML or copy it for use in a CMS or email template.
100% client-side. No uploads. Your data never leaves your browser.
How to use Markdown to HTML
- Type or paste Markdown in the left pane.
- The right pane shows a live sandboxed HTML preview that updates as you type.
- Switch to 'HTML' tab to see the raw HTML output with DOMPurify sanitization applied.
- Copy the HTML or download it as an .html file.
Frequently Asked Questions
Is the preview sandboxed from JavaScript execution?
Yes. The preview iframe uses sandbox='allow-same-origin' only. Scripts in the Markdown output cannot run.
Which Markdown flavors are supported?
CommonMark-compatible Markdown via the 'marked' library. GitHub Flavored Markdown (tables, strikethrough, task lists) is supported with the GFM extension.
Can I use this to build email templates?
Yes. The HTML output is self-contained and clean. Note that email clients have limited CSS support, so inline styles may work better than classes.
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