Markdown Editor & Viewer – Free Online Tool
Free online Markdown editor with live preview, syntax-highlighted code blocks, formatting toolbar, rich text copy, and export to HTML & MD. 100% client-side.
The Most Feature-Rich Free Markdown Editor Online
Our Markdown Editor combines a professional Monaco code editor with instant live preview, a full formatting toolbar, syntax-highlighted code blocks in 12+ languages, one-click rich text copy, auto-generated table of contents, and word/reading time statistics. Everything runs 100% in your browser — your documents never leave your device.
Powered by Monaco Editor and Marked.js
The editor pane uses Monaco (the same engine behind VS Code) for a professional writing experience with line numbers, bracket matching, and Markdown syntax highlighting. The preview pane uses Marked.js with highlight.js for accurate GitHub Flavored Markdown rendering with syntax-highlighted code blocks in JavaScript, Python, TypeScript, Go, Rust, and more.
Why Choose Our Markdown Editor Over Dillinger or StackEdit
Unlike Dillinger.io or StackEdit.io, we offer a one-click Copy Rich Text feature that lets you paste formatted output directly into Google Docs, Notion, or email. Plus we have a formatting toolbar, auto-generated table of contents, Markdown cheat sheet panel, word count with reading time, and syntax-highlighted code blocks — all free, no signup, no ads.
Who Benefits from This Markdown Editor
Developers writing README files and documentation, technical writers creating guides, bloggers drafting posts, students taking notes, open source maintainers managing project docs, and anyone who works with Markdown regularly. Our tool handles large documents with responsive rendering and a clean, distraction-free interface.
How to Use Markdown Editor & Viewer
- 1
Start typing Markdown in the left editor pane or use the formatting toolbar to insert headers, bold text, links, images, tables, and code blocks
- 2
See your document rendered instantly in the right preview pane with full styling
- 3
Copy as rich text to paste into Google Docs, Notion, or email — or export as .md or standalone .html file
Frequently Asked Questions
Everything you need to know about the Markdown Editor & Viewer.
Is this Markdown editor completely free?
Yes, 100% free with no signup, no daily limits, and no ads. Everything runs in your browser — there are no server costs to recoup.
What Markdown flavors are supported?
We support GitHub Flavored Markdown (GFM) which includes tables, task lists, strikethrough, autolinks, and fenced code blocks with syntax highlighting. Standard CommonMark syntax is also fully supported.
Can I copy the formatted output into Google Docs or Notion?
Yes! Use the 'Copy Rich' button to copy the rendered HTML to your clipboard. When you paste into Google Docs, Notion, email, or any rich text editor, the formatting (headers, bold, code, tables) is preserved perfectly.
Is my document data private and secure?
Absolutely. All Markdown parsing and HTML rendering happens locally in your browser using client-side JavaScript. Your documents are never uploaded to any server. The HTML output is also sanitized with DOMPurify to prevent XSS attacks.
What code languages are supported for syntax highlighting?
We support syntax highlighting for JavaScript, TypeScript, Python, HTML, CSS, JSON, Bash, SQL, Go, Rust, and Java. Code blocks using triple backtick fences with a language identifier are automatically highlighted.
Can I export my Markdown document?
Yes, you can export as a raw .md file or as a standalone .html file with built-in styling and syntax highlighting. The HTML export includes a complete document with dark theme styling that looks great when opened in any browser.