Markdown to HTML Converter
Write or paste Markdown and watch the HTML — and a live preview — update instantly, entirely in your browser.
How to use the Markdown to HTML Converter
- Type or paste Markdown into the editor on the left.
- The HTML preview on the right updates live as you type.
- Click "Copy HTML" to copy the generated markup, or "Download HTML" to save it as a file.
- Click "Clear" to start with a blank editor.
How it works
This converter is a small Markdown-to-HTML engine written from scratch in plain JavaScript, with no external library, so every step of how your text becomes HTML stays under this page's control. The whole input is HTML-escaped first, turning a literal < into < before anything else happens, and only afterward does the parser look for Markdown syntax like # headings, **bold**, or [links](url) and wrap the already-escaped text in the matching tags. That order is what keeps it safe: something like typed into the editor is escaped before parsing even starts, so it renders as visible text in the preview, exactly as typed, rather than becoming a real image tag. Links get an extra check on top of that — only http, https, and mailto addresses (or relative links) are turned into clickable tags, so a javascript: URL is detected and downgraded to plain text instead of becoming clickable.
Frequently asked questions
Is my Markdown uploaded to a server?
No — parsing and rendering happen entirely in your browser with JavaScript. Nothing is sent anywhere.
Is the preview safe from malicious Markdown?
Yes. Every character of your input is HTML-escaped before any Markdown syntax is converted into tags, so pasting something like a