Render and edit Markdown in real-time with comprehensive GitHub Flavored Markdown (GFM) support, including multi-level headings, bold, italic, tables, checklists, code blocks, blockquotes, and LaTeX maths typeset by KaTeX.
Runs entirely in your browser: the document is never uploaded and nothing is fetched from a third party. Supports one-click HTML/MD copying, file downloading, and word/character statistics.
Frequently asked questions
Does it support GitHub Flavored Markdown (GFM)?
Yes, tables, task lists (- [x]), autolinks, and strikethrough (~~text~~) are fully supported.
How are formulas rendered?
By KaTeX, running locally — inline as $x^2$ and display as $$…$$. It is served from this site rather than a CDN, and only loaded once your document actually contains a formula. A dollar sign used as money, like $5 or $10, is left as text.
Is my document private and safe?
Completely. Parsing and rendering happen in your browser, the document is never sent anywhere, and no third-party script is involved.
Can I export the rendered HTML?
Yes, you can copy the HTML directly to clipboard or download it as a standalone HTML file. Formulas are exported as MathML, so the file renders on its own without needing any stylesheet or font from this site.
中文说明
纯本地双栏实时 Markdown 渲染与编辑工具，支持 GitHub Flavored Markdown (GFM) 全特性，包括多级标题、代码块、表格、任务清单、排版样式，以及由 KaTeX 排版的 LaTeX 数学公式（行内 $x$ 与块级 $$…$$）。
100% 浏览器本地毫秒级解析渲染，文档不上传、不经过任何第三方服务；支持一键复制渲染后 HTML、导出标准 .md 与 .html 文件，实时统计字数与预估阅读时长。
常见问题
支持 GitHub Flavored Markdown (GFM) 语法吗？
完全支持，包含表格语法、任务复选框 (- [x])、删除线 (~~text~~)、超链接自动识别等。
数学公式是怎么渲染的？
由 KaTeX 在你的浏览器本地排版：行内写 $x^2$，块级写 $$…$$。KaTeX 由本站自托管而非 CDN，且只在文档真的出现公式时才按需加载。金额里的美元符号（如 $5 或 $10）会照原样显示，不会被误判成公式。
我的文档内容安全吗？
100% 安全。解析与渲染全部在你的浏览器本地进行，文档不会被发送到任何地方，也不加载任何第三方脚本，离开页面即清空。
支持导出为 HTML 文件吗？
支持，可一键复制渲染后的 HTML 源码，或一键下载独立的 .html 文件。文件里的公式以 MathML 形式导出，浏览器可直接排版，无需依赖本站的样式表或字体。