#1 Free Markdown to HTML Converter

Markdown to HTML ConverterFree, Clean & Professional

Convert Markdown to clean, semantic HTML instantly. No installs, no accounts — works in your browser.

No file size limit
Preserves headings, tables & code blocks
100% browser-side — private & secure
Supports GitHub-flavored Markdown

Ready to Convert?

Paste your Markdown content below and watch it convert instantly

How It Works

Convert your Markdown to HTML in three simple steps with our powerful plugin system

Step 1

Write Markdown

Type or paste your Markdown content in the left editor. Support for GFM, tables, code blocks, and more.

  • Real-time preview
  • Character & word count
  • GFM syntax support
Step 2

Configure Plugins

Customize the conversion pipeline by enabling or disabling plugins based on your needs.

  • 12+ powerful plugins
  • Easy toggle on/off
  • Custom plugin options
Step 3

Copy & Use

Preview the rendered HTML or view the source code. Copy it with one click and use anywhere.

  • Clean HTML output
  • Preview or code view
  • One-click copy

Plugin Ecosystem

Built on top of the unified ecosystem - a collection of open-source tools for processing content with syntax trees

unified

Core interface for processing content with syntax trees

core

remark-parse

Parse Markdown text into a syntax tree

parser

remark-gfm

Support GitHub Flavored Markdown (tables, strikethrough, task lists)

transformer

remark-math

This project is a monorepo that contains several packages for dealing with math in markdown and HTML.

transformer

remark-rehype

Transform Markdown syntax tree to HTML syntax tree

transformer

rehype-katex

Support math notation with Katex

transformer

rehype-raw

Parse raw HTML embedded in Markdown

transformer

rehype-format

Format HTML with proper indentation and whitespace

formatter

rehype-stringify

Serialize HTML syntax tree to HTML string

compiler

Want to learn more about the unified ecosystem?

Visit unifiedjs.com

Powered by Unified Ecosystem

Real-time

Instant conversion as you type

Plugin System

Modular and customizable

Privacy First

All processing in browser

Flexible

Configure every detail

Got Questions?

Frequently Asked Questions

Everything you need to know about converting Markdown to HTML

What is a Markdown to HTML converter?

A Markdown to HTML converter transforms Markdown-formatted text into clean, semantic HTML code. Our tool uses the powerful unified ecosystem (remark + rehype) to parse your Markdown and generate production-ready HTML instantly in your browser.

Is this converter completely free to use?

Yes! This Markdown to HTML converter is 100% free with no hidden costs, registration requirements, or usage limits. Convert as many documents as you need, whenever you need them, without any restrictions.

Do I need to install any software?

No installation required! This is a pure web-based tool that runs entirely in your browser. Simply open the page, paste your Markdown, and get instant HTML output. It works on any device with a modern web browser.

What Markdown syntax features are supported?

We support all standard Markdown syntax including headings, emphasis (bold/italic), lists, links, images, code blocks, blockquotes, and horizontal rules. Additionally, we support GitHub Flavored Markdown (GFM) which includes tables, strikethrough, task lists, and autolinks.

What is the plugin system and how do I use it?

Our converter uses a powerful plugin system built on unified/remark/rehype. The plugin panel at the bottom lets you enable or disable specific processing plugins like GFM support, raw HTML parsing, and HTML formatting. Each plugin can be configured with custom options to match your exact needs.

Is my data safe? Where is it stored?

Your privacy is guaranteed. All Markdown to HTML conversion happens 100% client-side in your browser. Your content never leaves your device, is never uploaded to any server, and is never stored or tracked. This ensures complete privacy and security for your documents.

Can I use HTML tags directly in my Markdown?

Yes! With the "Raw HTML Support" plugin enabled (enabled by default), you can mix HTML tags directly into your Markdown content. The converter will parse and preserve your HTML tags in the final output, giving you maximum flexibility.

How do I copy the generated HTML?

Switch to "Code" view mode in the preview panel, and click the "Copy HTML" button. The entire HTML output will be copied to your clipboard, ready to paste into your code editor, CMS, or any other application.

What's the difference between Preview and Code view modes?

Preview mode shows how your HTML will render in a browser with actual styling and formatting. Code mode displays the raw HTML source code with proper syntax highlighting, perfect for copying and pasting into your projects.

Does the converter work offline?

Once the page is initially loaded, the converter works completely offline since all processing happens in your browser. You can convert Markdown to HTML even without an internet connection, though you'll need to reload the page online first.

What is unified/remark/rehype?

Unified is a powerful ecosystem for processing content as structured data. Remark is the Markdown processor, and rehype is the HTML processor. Together, they provide a professional-grade, plugin-based architecture for reliable and extensible Markdown to HTML conversion.

Can I format the HTML output?

Yes! The "Format HTML" plugin (enabled by default) automatically formats your HTML output with proper indentation and line breaks, making it clean and readable. You can disable this plugin if you prefer compact, minified HTML.

Are there any file size limits?

There are no strict file size limits. The converter processes content in your browser, so performance depends on your device capabilities. Most documents convert instantly, though extremely large files (100KB+) may take a few seconds to process.

Why should I use this tool instead of other converters?

Our converter stands out with real-time conversion, a flexible plugin system, complete privacy (no server uploads), professional unified ecosystem foundation, clean semantic HTML output, GitHub Flavored Markdown support, and a modern, intuitive interface. Plus, it's 100% free and open source.

Ready to Start?

Start Converting Markdown to HTML

Join thousands of developers using our free, fast, and secure Markdown to HTML converter

Lightning Fast

Real-time conversion with instant preview. No waiting, no delays.

100% Private

All processing happens in your browser. Your data never leaves your device.

Powerful Plugins

Customize with unified ecosystem plugins. Full GFM support included.

No registration required • No credit card needed • No installation