Markdown Preview
Write Markdown and see the rendered result live. Supports GFM headings, tables, task lists, code blocks and more. Export as HTML.
Welcome to Markdown Preview
A fast, live Markdown editor right in your browser. No data is sent to any server.
Features
- ✅ Live preview as you type
- ✅ GitHub-Flavoured Markdown (GFM)
- ✅ Syntax-highlighted code blocks
- ✅ Tables, task lists, blockquotes
- ✅ Export as HTML
Code Example
// Fibonacci with memoization
function fib(n, memo = {}) {
if (n in memo) return memo[n];
if (n <= 1) return n;
return memo[n] = fib(n - 1, memo) + fib(n - 2, memo);
}
console.log(fib(40)); // 102334155Table
| Method | URL | Status |
|---|---|---|
| GET | /api/users | 200 OK |
| POST | /api/users | 201 Created |
| DELETE | /api/users/:id | 204 No Content |
Task List
- Install Node.js
- Create Angular project
- Deploy to production
- Add unit tests
Blockquote
"Any fool can write code that a computer can understand. Good programmers write code that humans can understand." — Martin Fowler
Inline Formatting
This is bold, this is italic, this is strikethrough, and this is inline code.
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What is Markdown Preview?
Markdown is a lightweight markup language created by John Gruber in 2004 as a way to write content for the web using plain text that is easy to read and write. The core idea is that text surrounded by simple symbols — asterisks for bold, hyphens for lists, hash symbols for headings — is converted into HTML automatically. Markdown is now the standard writing format for GitHub READMEs, documentation sites, developer blogs, Stack Overflow answers, Notion, Obsidian, and dozens of other platforms.
Because Markdown renders to HTML, what you write is not always what you see. A Markdown editor with live preview lets you write in the simple plaintext format while seeing the formatted output in real time — so you can check headings, lists, code blocks, tables, and links exactly as they will appear.
Altairys's Markdown Preview editor features a split-pane view with the Markdown editor on the left and the rendered HTML preview on the right, updating with every keystroke. It supports the full CommonMark specification plus GitHub Flavored Markdown (GFM) extensions: tables, task lists, strikethrough, fenced code blocks with syntax highlighting, and footnotes. You can export the rendered content as HTML or copy the generated HTML to paste into any CMS or editor.
How to Use Markdown Preview
- Write Markdown
Type your Markdown in the left panel — use # for headings, ** for bold, - for lists.
- See live preview
The right panel renders your Markdown to formatted HTML in real time as you type.
- Copy HTML output
Copy the rendered HTML to paste into your website, CMS, or email template.
- Export
Download the rendered HTML as a file for use in documentation or static sites.
Key Benefits
See your formatted output update with every keystroke — no manual refresh.
Supports GFM: tables, task lists, fenced code blocks, strikethrough, and footnotes.
Code blocks are syntax-highlighted for 100+ programming languages.
Copy or download the generated HTML for direct use in websites and CMSes.
Frequently Asked Questions
Markdown is a plain-text formatting syntax that converts to HTML. It uses simple punctuation marks: # for headings, **text** for bold, *text* for italic, - for list items, [text](url) for links, and ```code``` for code blocks.
CommonMark is a standardised specification for Markdown. GitHub Flavored Markdown (GFM) is a CommonMark extension that adds tables, task lists (- [x] done), strikethrough (~~text~~), and auto-linking of URLs and @mentions.
Yes. This editor supports GitHub Flavored Markdown, which is exactly the flavour used for GitHub README.md files. What you see in the preview is what GitHub will render.
Use pipes and hyphens: | Column 1 | Column 2 | on the first line, | --- | --- | on the second line (the separator), and then data rows in the same pipe-separated format.