Markdown Tools

Live-preview editor, HTML → Markdown converter, one-click export to WeChat / PDF / Word

Edit & Validate

Write, convert, extract from HTML, lint formatting, and preview Mermaid

Markdown Editor

Don't know how to open a .md file? Drop it in your browser to view and edit instantly. Online Markdown editor with live side-by-side preview, code highlighting, image upload, and dark mode. Drafts auto-save locally — 100% private.

Mermaid Diagram

Online Mermaid diagram editor with real-time preview. Type Mermaid syntax and instantly render flowcharts, sequence diagrams, class diagrams, ER diagrams, Gantt charts, and pie charts. Export as SVG or PNG. Runs entirely in your browser — code never leaves your device.

LaTeX Formula

Online LaTeX formula editor with real-time preview. Insert Greek letters, integrals, matrices with one click. Export to SVG/PNG. Runs entirely in browser — no data upload.

HTML to MD

Paste any HTML — copied from a webpage, WeChat article, blog post or rich-text editor — and convert it to clean, GFM-flavored Markdown. Smart cleanup of inline styles, tables, code blocks, blockquotes and images. Runs 100% in your browser; nothing is uploaded.

MD Lint

Paste or import Markdown and auto-fix formatting errors in one click — missing spaces after # headings, trailing spaces, inconsistent list numbering, missing blank lines, and more. Powered by markdownlint, runs entirely in your browser.

Share & Publish

Create share links and publish to WeChat, Xiaohongshu, and content platforms

Markdown Share

Paste your Markdown document and generate a shareable preview link. Recipients see the full rendered layout without installing anything. Links expire automatically after 7 days. Data stays in your browser.

MD Export

Free online converter: turn Markdown / .md files into PDF, Word (.docx), or images (PNG/JPG). Chinese fonts, syntax highlighting, tables and task lists preserved. Smart PDF pagination never clips content. No Pandoc, no install — 100% browser-based, files never uploaded.

MD to WeChat

For Markdown writers who already draft in Obsidian, VSCode, or Typora: paste your .md, see a true WeChat-style live preview, copy and paste into the WeChat editor with all formatting preserved. Supports local image uploads: images referenced in your Markdown are detected automatically, uploaded and stored in browser IndexedDB (persists across page reloads), or import a ZIP / folder to batch-import images. Code highlighting, blockquotes, tables — all rendered the way WeChat displays them.

MD to RedNote

Turn a Markdown note (tech blog, study notes, knowledge digest) into a multi-card Xiaohongshu carousel. Auto-splits by H2 headings or `---` dividers, renders as 3:4 / 4:5 image cards with multiple themes designed for the Markdown-writer audience.

Frequently Asked Questions

Markdown content creators have a distinct workflow: write → preview → convert → publish. Bundling the tools into one workspace makes the journey obvious. We focus the copy and FAQs on Markdown-writer scenarios (Obsidian / VSCode / Typora source files, one-source multi-channel publishing) — different from the document-conversion angle of /docs/.

Encountered other problems or suggestions? Have a bug or suggestion? Drop us an email.

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The complete Markdown content workbench in 2026

Markdown is the de-facto standard for technical blogs, knowledge bases, product docs and long-form social posts. But a real Markdown workflow is more than "open an editor and type" — it's a chain of writing → conversion → multi-platform distribution, and every step needs to be both fast and private.

The MeTool /markdown/ category is built for exactly that chain: a lightweight Markdown editor for pure writing, a LaTeX formula editor for mathematical typesetting, an HTML → Markdown converter for importing back, and one-click publishers to WeChat / Xiaohongshu / PDF / Word / Image / HTML, organized as a single workbench. Every tool runs in your browser; drafts and outputs never leave your device.

Eight core tools, organised around a "one-source, multi-channel" workflow: the source draft is written in the editor, math formulas are composed in the LaTeX editor, HTML content is reverse-imported via fromHtml, and the same .md is then distributed to its target channels via wechat / xiaohongshu / convert — without re-formatting at any step.

The 8 tools in the MeTool Markdown workbench

Writing, math & reverse import

  • Online Markdown editor: side-by-side editor with live preview, auto-saved to localStorage. Best for quick drafts, cross-device temporary bridging, anywhere you don't want to set up a desktop app.
  • LaTeX Formula Editor: real-time rendered LaTeX math formula editor powered by KaTeX. Write inline and display formulas, copy as SVG / PNG image or raw LaTeX — ideal for academic papers, technical blogs, and STEM educators.
  • Mermaid Diagram Editor: turn text-based diagram syntax into flowcharts, sequence diagrams, Gantt charts and more with live preview and one-click PNG / SVG export.
  • HTML → Markdown converter: paste webpage source, WeChat article HTML or rich-text editor content and get clean GFM Markdown. Built for content migration and scraped-content cleanup.
  • Markdown Linter & Formatter: auto-fix common Markdown style issues — spacing, heading hierarchy, list indentation — with diff preview before applying.

Multi-channel distribution

  • Markdown → WeChat Article: true WeChat-style live preview; copy and paste into the WeChat backend editor with all formatting preserved. Designed for Markdown writers already drafting in Obsidian / VSCode / Typora.
  • Markdown → Xiaohongshu Cards: auto-slices into 3:4 / 4:5 cards by H2 or ---; 6+ themes designed for tech, learning and reading-note content.
  • Markdown → PDF / Word / Image / HTML: the same .md becomes a PDF for clients, .docx for editors, image for socials, HTML for the web — six formats sharing one font, theme, and code-highlighting config.

Note: MeTool also keeps the same tools at /docs/* URLs (/docs/mdToWeixinArtical, /docs/mdToXiaohongshu, /docs/markdownConvert) under a "document conversion" angle, mainly serving users who search for "WeChat typesetting tool" or "Xiaohongshu image generator" keywords. Same engine underneath, different SEO copy and target audience.