Markdown to HTML

Convert Markdown to clean HTML with live preview.

Markdown

<h1>Hello World</h1></p><p>This is <strong>bold</strong> and <em>italic</em> text.</p><p><h2>Features</h2></p><p><ul><li>Fast conversion</li>
<li>Live preview</li>
<li>Copy HTML</li></ul></p><p><blockquote>This is a blockquote</blockquote></p><p><a href="https://calcorithm.com">Visit Calcorithm</a>

What is Markdown?

Markdown is a lightweight markup language created by John Gruber in 2004. It allows you to write plain text using simple formatting conventions — asterisks for bold, hyphens for lists, pound signs for headings — that convert to HTML. The goal is to make formatted text readable as plain text, unlike HTML which is cluttered with tags. Markdown is now the de-facto writing format for README files, documentation, blog posts, notes, and developer tools worldwide.

Core Markdown syntax

Element	Markdown syntax	HTML output
Heading 1	# Heading 1	<h1>Heading 1</h1>
Heading 2	## Heading 2	<h2>Heading 2</h2>
Bold	bold text	<strong>bold text</strong>
Italic	italic text	<em>italic text</em>
Link	[text](https://url)	<a href="https://url">text</a>
Image	![alt](image.png)	<img src="image.png" alt="alt">
Unordered list	- Item 1 - Item 2	<ul><li>Item 1</li>...
Ordered list	1. First 2. Second	<ol><li>First</li>...
Inline code	`code here`	<code>code here</code>
Code block	```language code ```	<pre><code>code</code></pre>
Blockquote	> quoted text	<blockquote>quoted text</blockquote>
Horizontal rule	---	<hr>

Where Markdown is used

GitHub / GitLab

README.md files, issue descriptions, pull request descriptions, wikis

Notion / Obsidian

Knowledge management and note-taking tools that render Markdown natively

Jekyll / Hugo / Gatsby

Static site generators use Markdown as the content format for blog posts and pages

Slack / Discord

Chat tools support a subset of Markdown for basic text formatting

Old Reddit uses Markdown for post and comment formatting

Jupyter Notebooks

Data science notebooks use Markdown for documentation cells alongside code

Frequently asked questions

What is Markdown?

Markdown is a lightweight markup language that uses plain-text symbols — like # for headings and ** for bold — to format text, which can then be converted to HTML.

Is the conversion done in my browser?

Yes. Your Markdown is converted to HTML locally, so nothing you type is uploaded to a server.

Which Markdown features are supported?

Standard Markdown: headings, bold, italic, links, images, lists, blockquotes, inline code and code blocks. These cover the vast majority of writing needs.