Markdown to HTML
Convert Markdown to clean HTML with live preview. Supports headings, bold, italic, links, code blocks, tables, task lists, and more - all running privately in your browser.
Markdown Cheat Sheet
Quick reference for the most common Markdown syntax elements supported by this converter.
inline codeHow It Works
This tool uses a custom Markdown parser built entirely in JavaScript. When you type or paste Markdown into the editor, the parser processes it in real time and generates clean, semantic HTML output.
Supported Syntax
The converter supports a comprehensive set of Markdown features including standard Markdown and GitHub-flavored Markdown (GFM) extensions:
- Block elements: Headings (h1-h6), paragraphs, blockquotes, code blocks, horizontal rules, tables
- List types: Unordered lists, ordered lists, task lists with checkboxes
- Inline formatting: Bold, italic, strikethrough, inline code, links, images
- Code blocks: Fenced code blocks with language specification and basic syntax highlighting
Privacy First
All processing happens client-side in your browser. No data is transmitted to any server, no cookies are set, and no analytics are collected. Your content stays completely private.
Hacker News Discussions
- Show HN: Defuddle, an HTML-to-Markdown alternative to Readability 418 points · 68 comments
- Show HN: HTML-to-Markdown – convert entire websites to Markdown with Golang/CLI 360 points · 47 comments
- Reader-LM: Small Language Models for Cleaning and Converting HTML to Markdown 199 points · 43 comments
Source: Hacker News
Research Methodology
This markdown to html tool was built after analyzing search patterns, user requirements, and existing solutions. We tested across Chrome, Firefox, Safari, and Edge. All processing runs client-side with zero data transmitted to external servers. Last reviewed March 19, 2026.
Community Questions
- How to convert Markdown to HTML in JavaScript? 16 answers · tagged: javascript, markdown, html
- Which Markdown parser library is best for the browser? 9 answers · tagged: javascript, markdown, parser
- How to safely render Markdown without XSS vulnerabilities? 11 answers · tagged: markdown, security, xss
Performance Comparison
Benchmark: processing speed relative to alternatives. Higher is better.
PageSpeed Performance
Measured via Google Lighthouse. Single HTML file with zero external JS dependencies ensures fast load times.
npm Ecosystem
| Package | Description |
|---|---|
| marked | Markdown Parser |
| markdown-it | Markdown |
Data from npmjs.com. Updated March 2026.
Live Stats
How This Tool Works
The Markdown to HTML runs entirely in your browser using JavaScript. No data is uploaded to any server, which means your information stays private and the tool works even without an internet connection after the initial page load.
Enter your input, adjust any available options, and the tool processes everything locally to produce the result. The output can typically be copied to your clipboard or downloaded as a file for use in your projects.
There are no usage limits, no accounts required, and no tracking. You can use the tool as many times as you need, making it ideal for both quick one-off tasks and repeated daily workflows.
Features and Options
The interface is designed for simplicity and speed. Core functionality is immediately accessible, while advanced options are available for users who need more control. Sensible defaults mean you can get a useful result without changing any settings.
Output options include clipboard copy and file download in standard formats. The tool generates clean, well-formatted output that is ready to use in your workflow without additional processing or cleanup.
The responsive design works on screens of all sizes, from large desktop monitors to mobile phones. All interactive elements are accessible via keyboard and compatible with screen readers.
Frequently Asked Questions
Markdown is a lightweight markup language created by John Gruber in 2004. It uses plain text formatting syntax that can be converted to HTML and other formats. It is widely used for documentation, README files, blog posts, and online content creation.
No. All conversion happens entirely in your browser using JavaScript. Your Markdown content never leaves your device. There is no server-side processing, no tracking, and no data collection.
This converter supports headings (h1-h6), bold, italic, strikethrough, links, images, inline code, fenced code blocks with syntax highlighting, blockquotes, ordered and unordered lists, horizontal rules, tables, and task lists with checkboxes.
Yes. This tool supports most GitHub-flavored Markdown (GFM) extensions including strikethrough (~~text~~), tables, task lists, and fenced code blocks with language specification.
Use pipes (|) to separate columns and hyphens (-) for the header row separator. For example: | Header 1 | Header 2 | followed by | --- | --- | and then your data rows. You can align columns using colons in the separator row (:--- for left, :---: for center, ---: for right).
Yes. Click the "Download HTML" button to save a complete .html file with proper document structure, including a basic stylesheet. You can also copy the raw HTML to your clipboard using the "Copy HTML" button.
Yes. Fenced code blocks with a language identifier (for example, ```javascript) receive basic syntax highlighting for keywords, strings, comments, and numbers in the live preview. The raw HTML output includes the appropriate CSS classes for highlighting.
Markdown is a simplified writing format designed for readability, while HTML is a full markup language for web pages. Markdown is easier to write and read in plain text, but HTML offers more precise control over layout and styling. Markdown is typically converted to HTML for display on the web.