Edit Markdown Online - Free, Fast, and Feature-Rich
Markdown Editor Online is a free, professional-grade tool for editing Markdown documents with instant live preview.
Create technical documentation, blog posts, README files, and more with full Mermaid diagram support,
syntax highlighting, and export to HTML. No signup required – start editing immediately.
The most comprehensive free Markdown editor with professional features. Perfect for developers,
technical writers, content creators, and anyone working with Markdown documents. Learn more in our FAQ.
Live Preview
See your Markdown rendered in real-time as you type. Split-pane view lets you edit and preview simultaneously with instant updates.
Mermaid Diagram Support
Create flowcharts, sequence diagrams, Gantt charts, and more with full Mermaid.js integration. Perfect for technical documentation.
VS Code Keybindings
Powered by Monaco Editor with familiar VS Code shortcuts. Multi-cursor editing, find & replace, and powerful keyboard navigation.
HTML Export
Export your Markdown to beautifully styled HTML with preserved formatting. Unlimited exports, completely free.
Dark Mode
Toggle between light and dark themes. Automatically detects your system preference and remembers your choice.
Auto-Save
Never lose your work. Documents are automatically saved to your browser's local storage every 2 seconds.
How It Works
1
Start Writing
Type or paste your Markdown content in the editor. Use templates to get started quickly.
2
See Live Preview
Watch your Markdown render in real-time with syntax highlighting and Mermaid diagrams.
3
Export & Share
Export to HTML when ready. Your work is auto-saved and always accessible.
Perfect For
📝
Developers
Write README files and technical documentation
✍️
Technical Writers
Create product documentation with diagrams
📚
Content Creators
Write blog posts and articles
🎓
Students
Take notes and write assignments
Frequently Asked Questions
Everything you need to know about our free Markdown editor
Is this Markdown editor really free?
Yes, our Markdown editor is 100% free with unlimited usage. There are no hidden costs, no premium tiers, and no subscription fees. You can create, edit, and export as many Markdown documents as you want without any limitations. All features including Mermaid diagrams, dark mode, and HTML export are completely free.
Do I need to create an account or sign up?
No signup or registration is required. You can start using the Markdown editor immediately without creating an account. Your documents are automatically saved to your browser's local storage, so your work is preserved between sessions without any account needed.
What is Markdown and why should I use it?
Markdown is a lightweight markup language that lets you format text using plain text syntax. It's widely used for writing documentation, README files, blog posts, and technical content. Markdown is easier to write than HTML, readable as plain text, and converts beautifully to formatted documents. It's the standard format for GitHub, Reddit, Stack Overflow, and many other platforms.
Does this editor support Mermaid diagrams?
Yes! We have full Mermaid.js integration supporting flowcharts, sequence diagrams, Gantt charts, class diagrams, state diagrams, pie charts, and more. Simply use the ```mermaid code block syntax and your diagrams will render automatically in the live preview.
Can I export my Markdown to other formats?
Yes, you can export your Markdown documents to HTML format with preserved styling and formatting. The HTML export is unlimited and completely free. Your exported files include all formatting, code blocks, tables, and even Mermaid diagrams rendered as images.
Is my data safe? Where is it stored?
Your data is completely safe and private. All documents are saved locally in your browser's storage (LocalStorage) - nothing is sent to our servers. Your Markdown content never leaves your device unless you explicitly choose to export it. This means your documents are private, secure, and accessible only to you. Read our privacy policy for more details.
What makes this different from other Markdown editors?
Our editor combines the best features: full Mermaid diagram support, Monaco editor (the same editor as VS Code), real-time preview, dark mode, auto-save, professional templates, and unlimited free exports. Unlike other editors, we require no signup, have no feature limitations, and focus on providing a fast, clean editing experience without distractions.
Does it work offline?
The editor requires an internet connection to load initially, but once loaded, your saved documents are accessible offline from your browser's local storage. You can continue editing your existing documents without an internet connection. However, exporting files and loading the editor for the first time requires internet access.
Can I use keyboard shortcuts like in VS Code?
Yes! We use Monaco Editor (the same editor that powers VS Code), so all your familiar VS Code keyboard shortcuts work here. This includes multi-cursor editing (Ctrl/Cmd+Click), find and replace (Ctrl/Cmd+F), command palette (F1), and many more. It's designed to feel familiar to developers and power users.
Is this editor suitable for technical documentation?
Absolutely! Our editor is perfect for technical documentation. It supports syntax-highlighted code blocks in 100+ programming languages, tables, task lists, footnotes, and Mermaid diagrams for architecture and flow diagrams. We also provide templates specifically for API documentation, README files, and technical specifications to help you get started quickly.