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Paste Markdown, preview sanitized HTML live, then copy the HTML source - no upload. This page is for quick README drafts, CMS fields that only accept HTML, and email snippets you want to check before pasting into a template. Conversion runs with marked, then DOMPurify strips scripts and common event handlers before the preview pane renders. Switch to HTML source when you need the markup itself; Clear resets both panes. Closing the tab discards everything - nothing is stored on a server.

Input: bytes

Output: bytes

Markdown to HTML Previewer

Last reviewed: 2026-07-20

Paste Markdown on the left and get a live HTML preview on the right - plus a copyable HTML source view - all in this tab.

Typical use: draft README notes, email snippets, or CMS body copy in Markdown, then paste the HTML into a tool that only accepts HTML.

Conversion uses marked, then DOMPurify sanitizes the HTML before preview. Closing the tab clears everything; nothing is uploaded.

Need step-by-step clicks? See the step-by-step guide. Comparing with desktop apps or upload sites? See vs alternatives.

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Last updated: Jul 20, 2026

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Frequently Asked Questions

What does Markdown to HTML Previewer do?

It converts pasted Markdown into sanitized HTML in your browser, with a live preview and a copyable HTML source view.

Is my Markdown uploaded anywhere?

No. Conversion runs in this tab with local marked and DOMPurify scripts. Closing the tab clears the preview.

Can inline HTML in Markdown run scripts?

Preview output passes through DOMPurify, which strips script tags and common event handlers before the HTML is shown.