Markdown → HTML (Security Focus)
100% LocalConvert Markdown to clean HTML with XSS-safe sanitization.
Markdown Showcase
Welcome to Markdown to HTML, a live converter built with pure JavaScript.
Features
Here's what's supported:
- Bold, Italic, and Bold Italic text
StrikethroughtextInline code- Links and
Code Block
function greet(name: string): string {
return `Hello, ${name}!`
}
console.log(greet("World"))Ordered List
- First item
- Second item
- Third item
Blockquote
The best way to predict the future is to invent it. , Alan Kay
Table
| Name | Language | Stars |
|---|---|---|
| React | JavaScript | 220k |
| Next.js | TypeScript | 120k |
| Rust | Rust | 90k |
Horizontal Rule
Paragraphs are separated by blank lines. Two trailing spaces create a line break within a paragraph.
Paste Markdown to convert to HTML. Headings, lists, code blocks, and links all render.
What is Markdown → HTML (Security Focus)?
Frequently Asked Questions
Technical Deep Dive
Markdown → HTML (Security Focus)
Transform your Markdown documents into clean, well-structured HTML. Supports headings, lists, tables, code blocks, and more with a live preview and secure output featuring advanced HTML escaping.
Two-Way Conversion
Convert in either direction with consistent semantics on the round-trip.
Type-Faithful
Preserves nulls, numbers, booleans, and structure, no string-soup translation.
Production-Sized
Built to handle real-world payloads, not just textbook examples.
01 Markdown Support Matrix
| Feature | Syntax Example | HTML Output | Spec Group |
|---|---|---|---|
| Headings | # Header | <h1>Header</h1> | CommonMark |
| Code Blocks | ```js | <pre><code>... | GFM |
| Tables | | col | col | | <table>...</table> | GFM |
| Task Lists | - [x] Task | <li><input type="checkbox"... | GFM |
| Raw HTML | <script> | <script> | Security Patch |
02 Rendering Pipeline Workflow
03 Advanced Markdown Features
-
GitHub Flavored Markdown (GFM) This tool supports GFM extensions beyond standard CommonMark: pipe tables (|col1|col2|), task lists (- [x] done), strikethrough (~~text~~), autolinked URLs, and fenced code blocks with language-specific syntax highlighting. GFM is the de facto standard for README files, documentation sites, and developer platforms.
-
HTML Sanitization Raw Markdown can contain arbitrary HTML, which creates XSS risks when rendered in a browser. This tool sanitizes the output HTML to strip dangerous elements (script, iframe, onload attributes) while preserving safe structural HTML. Always sanitize user-submitted Markdown before rendering, libraries like DOMPurify handle this in production.