Markdown to HTML Converter

Markdown is a lightweight markup language created by John Gruber in 2004 with the goal of enabling people to write in an easy-to-read, easy-to-write plain text format that can be converted to structurally valid HTML. Since its creation, Markdown has become the de facto standard for documentation, README files, blog posts, forum comments, and technical writing across the software industry.

GitHub Flavored Markdown (GFM)

GitHub Flavored Markdown extends the original Markdown specification with features commonly needed in software development. GFM adds support for fenced code blocks with syntax highlighting hints, tables, task lists (checkboxes), strikethrough text, and autolinked URLs. This converter supports the full GFM specification, making it ideal for previewing GitHub README files and documentation.

Supported Syntax

This converter supports all standard Markdown elements: headings (h1-h6 via # Heading), bold (**text**), italic (*text*), links ([text](url)), images (![alt](url)), unordered lists (- item), ordered lists (1. item), blockquotes (> quote), inline code (`code`), fenced code blocks (```language), horizontal rules (---), tables, and task lists (- [x] done).

HTML Sanitization with DOMPurify

Raw HTML within Markdown can pose security risks, especially cross-site scripting (XSS) attacks. This tool uses DOMPurify, a trusted open-source library, to sanitize the generated HTML. DOMPurify removes potentially dangerous content like <script> tags, event handlers, and malicious attributes while preserving safe HTML structure. This ensures the output is safe to embed in any web page.

Preview vs Code View

This tool offers two output modes. The Preview mode renders the Markdown as it would appear in a browser, complete with styled headings, formatted lists, and interactive elements. The HTML Code mode shows the raw HTML markup, which you can copy and paste directly into your project. Both views update in real-time as you type, providing instant feedback on your Markdown.

Use Cases for Markdown to HTML

Developers commonly convert Markdown to HTML for building static websites, generating email newsletters, creating documentation sites, writing blog posts, and previewing README files. Content management systems like Jekyll, Hugo, and Gatsby use Markdown as their primary authoring format, converting it to HTML during the build process. This tool is perfect for quick previews and one-off conversions.

Markdown in Modern Development

Markdown has become deeply integrated into the modern development workflow. GitHub, GitLab, Bitbucket, Stack Overflow, Reddit, Discord, Slack, and countless other platforms support Markdown for content formatting. Static site generators, documentation tools like MkDocs and Docusaurus, and note-taking apps like Obsidian and Notion all use Markdown as their foundation. Understanding Markdown syntax is now an essential skill for developers, technical writers, and anyone working in technology.

100% Client-Side Processing

All Markdown parsing and HTML generation happens entirely in your browser. The tool uses the marked.js library for parsing and DOMPurify for sanitization. No data is transmitted to any server. Your Markdown content and generated HTML never leave your device, making this tool safe to use with confidential documentation.