Markdown Preview — Live Markdown Editor & Renderer Online

Markdown Preview renders Markdown in real time in a split-pane view alongside your source. It supports headings, bold, italic, links, images, code blocks, blockquotes, and lists.

Markdown Syntax Cheat Sheet

Headings: prefix a line with # for H1, ## for H2, up to ###### for H6. Bold: **text** or __text__. Italic: *text* or _text_. Inline code: `code`. Code block: wrap in triple backticks (```), optionally followed by the language name for syntax highlighting. Links: [label](url). Images: ![alt text](url). Blockquote: prefix a line with >. Unordered list: prefix lines with - or *. Ordered list: prefix lines with 1. 2. 3. Horizontal rule: --- on its own line.

The live preview in SmartDevBox updates as you type, so you can see the rendered result in real time. This is useful for writing README files, documentation, blog posts, or any content where you want to see the formatted output before publishing.

Markdown in Developer Workflows

GitHub, GitLab, and Bitbucket render README.md, CONTRIBUTING.md, and other Markdown files automatically. The preview here matches how GitHub renders standard CommonMark Markdown, making it useful for drafting and checking README content before committing. GitHub-specific extensions like task checkboxes (- [ ]) and emoji shortcodes (:rocket:) are not rendered here.

Markdown is also the native format for static site generators (Jekyll, Hugo, Astro, Docusaurus) and documentation tools (MkDocs, Docz, GitBook). Use this preview to check your content renders correctly before running the full build pipeline.

Common Use Cases

Previewing README.md files before committing to GitHub
Drafting blog posts or documentation in Markdown
Learning Markdown syntax with instant visual feedback

Frequently Asked Questions

What Markdown syntax does SmartDevBox support?

SmartDevBox supports standard CommonMark-compatible Markdown: headings (#), bold (**), italic (*), links, images, code blocks (```), inline code, blockquotes (>), and unordered/ordered lists.

Privacy & Security

This tool runs entirely in your browser using client-side JavaScript. No data is sent to a server — your input never leaves your machine. SmartDevBox has no account system, no usage tracking, and no paid tier. See the Privacy & Security page for full details.

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