QuickTooly

Free Online Markdown to HTML Converter - Live Preview

Paste or type Markdown on the left and watch the HTML render live on the right. Supports GitHub Flavored Markdown - tables, fenced code blocks, task lists, and more.

GFM tables, code blocks, task lists - live split preview, copy HTML in one click.

Perfect for developers, tech writers, and bloggers who need clean HTML from Markdown without any setup. Everything runs in your browser - nothing is sent to a server.

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Start typing Markdown on the left to see the preview here.

Quick Start

How to Convert Markdown to HTML Online

  1. Paste your Markdown - type or paste any Markdown text (or the contents of a .md file) into the left panel.
  2. See the live preview - the rendered output updates instantly on the right. Switch to HTML Source to see the raw HTML output.
  3. Copy the HTML - click Copy HTML to copy the result to your clipboard, then paste it wherever you need it.

Last updated: May 25 2026

Reviewed by the QuickTooly Team

Markdown Converter Guide

Why Convert Markdown to HTML?

  • Paste directly into CMSs: Most content management systems accept raw HTML. Convert your Markdown drafts in one click and paste the clean output.
  • GitHub Flavored Markdown: Supports GFM extensions - tables, fenced code blocks with language hints, strikethrough, and task lists - beyond the original Markdown spec.
  • Live split preview: See the rendered result and the raw HTML side by side as you type - no need to click Convert.
  • 100% private: Conversion happens entirely in your browser via JavaScript. Your text never touches a server.
  • Completely free: No account, no watermarks, no character limits.

Supported Markdown Syntax

Headings

Use # through ###### for h1–h6. Each heading level maps directly to the corresponding HTML heading tag.

Emphasis & Strong

Wrap text in *asterisks* or _underscores_ for italic. Use double asterisks or underscores for bold. Combine for bold italic.

Links & Images

Links use the syntax [label](url). Images follow the same pattern with a leading !: ![alt text](image.png).

Fenced Code Blocks (GFM)

Wrap code in triple backticks and optionally add a language identifier (e.g. ```js) for syntax highlighting hints. The converter outputs a <pre><code> block with a class="language-js" attribute compatible with Prism.js and Highlight.js.

Tables (GFM)

Pipe-delimited tables are fully supported. A separator row with dashes and optional colons controls column alignment. Tables render as semantic <table> HTML with <thead> and <tbody>.

Task Lists (GFM)

GitHub-style task lists are supported using - [ ] for unchecked and - [x] for checked items. They render as <input type="checkbox"> elements inside list items, just like GitHub README files.

Common Use Cases

CMS & Blog Publishing

Draft your content in Markdown for readability, then convert it to HTML and paste directly into WordPress, Ghost, Contentful, Sanity, or any CMS that accepts raw HTML. No reformatting required.

Developer Documentation

Convert .md files - README files, wikis, API docs, and changelogs - into embeddable HTML for documentation sites, internal portals, or static site generators that need pre-rendered markup.

Email & Newsletter Templates

Write your newsletter or announcement in Markdown, then convert it to HTML for use in Mailchimp, SendGrid, or any email client that accepts HTML. Keeps formatting consistent across platforms.

Frequently Asked Questions

Does this support GitHub Flavored Markdown?

Yes. The converter uses marked with GFM enabled by default, which adds support for tables, fenced code blocks with language identifiers, strikethrough (~~text~~), and autolinks on top of the CommonMark specification.

Is the output safe to use in a web page?

The converter outputs raw HTML exactly as specified by the Markdown. If you plan to render untrusted user content in a browser, sanitize the HTML output first with a library like DOMPurify before inserting it into the DOM, to prevent XSS vulnerabilities.

Can I convert large documents?

Yes - there is no character limit. The conversion runs entirely in your browser so performance depends on your device. Documents up to hundreds of thousands of characters convert in milliseconds on modern hardware.

Is my text stored or sent anywhere?

No. Everything happens locally in your browser using JavaScript. Your Markdown is never transmitted to any server, stored in any database, or shared with any third party.

How do I use the HTML output in my project?

Click HTML Source to switch to the raw HTML view, then click Copy HTML to copy it to your clipboard. Paste it directly into your CMS, email template, static site generator, or any HTML file.

Can I convert a .md file to HTML?

Yes. Open your .md file in any text editor, select all the content, and paste it into the left panel. The converter processes the full document instantly and gives you the HTML output ready to copy.

Does this work as a Markdown parser or just a converter?

Both - parsing and converting are the same step here. The tool uses marked, a full Markdown parser that reads your Markdown syntax and outputs semantic HTML. You get both the live rendered preview and the raw HTML source from the same parse.

What is the difference between Markdown and HTML?

Markdown is a lightweight plain-text format designed to be easy for humans to write and read. HTML is the markup language browsers render natively. Markdown-to-HTML conversion lets you write in the readable Markdown syntax and output the HTML that browsers and CMSs understand.