Markdown to HTML

Live preview and convert markdown instantly.

Drop a .md file or click to browse

Markdown Input

Understanding Markdown and HTML Conversion

Markdown is a lightweight markup language with plain-text-formatting syntax. It is widely adopted by developers and writers to author blogs, documentation, and technical notes, which are subsequently compiled into highly accessible semantic HTML.

The Markup Standard

Created by John Gruber in 2004, Markdown aims to be easy-to-read and easy-to-write in its raw form. It translates directly to HTML tags, enabling developers to write structured formats without typing verbose tags manually.

Parsing & AST Compilation

Our parser uses the high-performance **marked** package to tokenize plain text input into an Abstract Syntax Tree (AST), ensuring nested lists, code blocks, tables, and strong styling are correctly compiled into standard valid HTML elements.

Private Drafting Security

Drafting proprietary code documents or private thoughts demands robust confidentiality. All markdown parsing runs securely inside your local browser. There are no tracking scripts or external servers capturing your text.

Secure, Client-Side Conversions

ZeroServer.tools is built on the philosophy of full developer privacy. All compilation formulas execute inside sandboxed browser memory. The converted raw HTML output is rendered instantly on your screen and remains 100% private.

Frequently Asked Questions

What Markdown syntax does this converter support?

CommonMark specification: headings (#), bold (**), italic (*), strikethrough (~~), ordered/unordered lists, fenced code blocks, blockquotes (>), tables, links, and inline images.

Can I use the HTML output directly on my website?

Yes, but sanitize it first if Markdown was entered by end users (to prevent XSS). The output is raw HTML — inject it via innerHTML on trusted content, or through a sanitizer for user-generated content.

What's the difference between Markdown and HTML?

Markdown is a lightweight markup language designed for human readability — asterisks for bold, # for headings. HTML is the web rendering format. This tool converts Markdown to the HTML your browser renders.

Does Markdown preserve single line breaks?

No — a single newline within a paragraph becomes a space. To force a line break, add two trailing spaces or a backslash before the newline. Triple-backtick code blocks preserve all whitespace.

Can I preview the rendered output?

Yes — switch to the Preview tab to see the formatted output update in real-time as you type. The HTML Source tab shows the raw HTML for copying into your project.

Private & free — this tool runs entirely in your browser.