Free online MD viewer · No upload免费在线 MD 查看器 · 不上传

MD Viewer — view Markdown files onlineMD 查看器——在线查看 Markdown 文件

View any .md file right in your browser. Drop it below and read it as a formatted document — tables, code, diagrams and all.直接在浏览器里查看任何 .md 文件。拖到下方即可以格式化文档的形式阅读——表格、代码、图表一应俱全。

Drop your .md file here把 .md 文件拖到这里

or use one of the options below — nothing is ever uploaded或使用下方任一方式——文件绝不上传

100% private — your file never leaves your browser100% 隐私——你的文件绝不离开浏览器
Supports .md · .markdown · .txt  ·  up to 10 MB支持 .md · .markdown · .txt  ·  最大 10 MB

A markdown viewer that just works

This free md viewer renders GitHub-flavored Markdown exactly the way it was meant to look: headings become headings, tables become tables, task lists get real checkboxes, and code blocks get syntax highlighting. It also renders Mermaid diagrams and LaTeX formulas, which plain viewers usually skip — important now that ChatGPT and Claude routinely include both in their output.

Why an online viewer?

Windows and macOS have no built-in app associated with the .md extension, so double-clicking usually opens a wall of raw text — or nothing at all. Installing a code editor just to read one file is overkill. An md viewer online means: open the browser, drop the file, done. Nothing to install, nothing to configure, works the same on desktop and phone.

Private by design

Unlike many "online viewers", this page never uploads your file. All parsing happens locally in your browser with JavaScript. Close the tab and nothing remains.

How to use

  1. Drag your .md, .markdown or .txt file into the box above (or click Choose file).
  2. Read it as a clean document, with a table of contents, dark mode and adjustable text size.
  3. Optionally export to PDF or Word, or copy rich text into any app.

一个"拿来就能用"的 Markdown 查看器

这个免费的 MD 查看器按照 Markdown 应有的样子完整渲染 GFM：标题是标题、表格是表格、任务列表有真实的勾选框、代码块带语法高亮。它还支持 Mermaid 图表和 LaTeX 公式——普通查看器往往不支持，而 ChatGPT、Claude 的输出里这两样越来越常见。

为什么用在线查看器？

Windows 和 macOS 都没有默认关联 .md 扩展名的应用，双击通常只会看到一堆源码文本，甚至打不开。为了看一个文件去装一个代码编辑器太重了。在线 MD 查看器意味着：打开浏览器、拖入文件、完成。无需安装配置，电脑和手机体验一致。

隐私优先

与许多"在线查看器"不同，本页面从不上传你的文件。所有解析由浏览器本地 JavaScript 完成，关掉标签页即不留痕迹。

使用方法

  1. 把 .md、.markdown 或 .txt 文件拖入上方区域（或点击"选择文件"）。
  2. 以干净的文档形式阅读，支持目录、暗色模式与字号调节。
  3. 需要时可导出 PDF、Word，或复制富文本到任意应用。

FAQ

Does this MD viewer work on mobile?这个 MD 查看器支持手机吗？

Yes. The viewer is fully responsive and works in any modern mobile browser — open the page, tap Choose file, and read.支持。查看器完全响应式，任何现代手机浏览器都可使用——打开页面、点击选择文件即可阅读。

Which Markdown features are supported?支持哪些 Markdown 特性？

GitHub-flavored Markdown: headings, tables, task lists, strikethrough, fenced code with syntax highlighting, images, plus Mermaid diagrams and KaTeX math.完整 GFM：标题、表格、任务列表、删除线、带高亮的代码块、图片，另支持 Mermaid 图表与 KaTeX 数学公式。

Is there a file size limit?有文件大小限制吗？

Files up to 10 MB are supported, which covers virtually every real-world markdown document.支持最大 10 MB 的文件，足以覆盖几乎所有实际场景的 Markdown 文档。