Markdown is a lightweight markup language created by John Gruber in 2004. It lets you write formatted text using plain-text syntax that is easy to read and write. Markdown files use the .md extension and are widely used for README files, documentation, blog posts, forum messages, and technical writing. The syntax is designed to be intuitive: asterisks for bold and italic, hashes for headings, dashes for lists, and backticks for code.

This free online Markdown previewer renders your Markdown in real time as you type. It supports all common Markdown elements including headings, paragraphs, bold, italic, strikethrough, links, images, ordered and unordered lists, blockquotes, horizontal rules, tables, and fenced code blocks. The split-view layout lets you edit and preview side by side, and you can export the rendered output as a standalone HTML file.

• Real-time live preview that updates instantly as you type
• Split view, editor-only, and preview-only modes
• Full Markdown support: headings, bold, italic, strikethrough, links, images
• Tables with header rows and alignment
• Fenced code blocks with syntax display
• Blockquotes, ordered lists, and unordered lists
• Upload .md or .txt files to preview existing Markdown documents
• Export rendered output as a standalone HTML file with built-in styling
• Copy the raw HTML output to clipboard for embedding in other tools
• Fullscreen mode for distraction-free writing
• 100% client-side: no data is sent to any server

1. Write or paste Markdown in the editor panel on the left.
2. The rendered preview appears instantly on the right panel.
3. Switch between split view, editor-only, or preview-only modes using the toolbar.
4. Upload an existing .md file using the Upload button.
5. Click HTML to download the rendered output as a standalone HTML file.
6. Click Copy HTML to copy the raw HTML markup to your clipboard.

• Headings: use # for h1, ## for h2, ### for h3, and so on up to ######
• Bold: wrap text with **double asterisks**
• Italic: wrap text with *single asterisks*
• Strikethrough: wrap text with ~~double tildes~~
• Links: use the syntax [text](url)
• Images: use the syntax 
• Unordered lists: start lines with -, *, or +
• Ordered lists: start lines with 1., 2., 3.
• Code blocks: wrap with triple backticks on separate lines
• Inline code: wrap with single backticks like `code`
• Blockquotes: start lines with >
• Horizontal rule: use --- on its own line
• Tables: use pipes | and dashes - to create columns and headers

• Writing and previewing README files for GitHub repositories
• Drafting blog posts and technical documentation
• Previewing Markdown before committing to version control
• Converting Markdown notes to HTML for embedding in websites
• Teaching Markdown syntax with instant visual feedback
• Quickly formatting text for platforms that support Markdown

• Leave a blank line between paragraphs for proper spacing
• Use headings hierarchically: start with # and increase for subsections
• Indent code blocks with 4 spaces or use fenced code blocks with triple backticks
• For tables, align the pipe characters for better readability in the source
• Use reference-style links for long URLs to keep your Markdown clean
• Preview your Markdown before publishing to catch formatting issues