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.

Why does Markdown deserve its own category?

The real workflow of a Markdown content creator is the chain write → preview → convert → publish. They care about one outcome: "does my content look right on every platform I'm targeting?" Putting all the chain's tools in one workbench makes the journey visible — scattering them inside a generic "Document Tools" category, listed only by file type, hides the chain entirely.

The addition of a dedicated LaTeX formula editor reflects a specific gap in this workflow: math-heavy writers (STEM educators, researchers, technical bloggers) constantly context-switch between their Markdown editor and an external LaTeX renderer. With the LaTeX tool living in the same workbench, formulas can be composed and exported as images, then dropped directly into any platform — no context switch, no external dependency.

Privacy is also a core selection criterion for these creators. Their drafts are often unreleased product specs, untested opinions, confidential client material. The common property of every Markdown tool here: from input to output, everything happens in your browser's memory, with no fetch/XHR request sending content out. That makes it a safe writing environment for internal teams, distributed companies, and independent creators alike.

In 2026 we're continuing to invest in this direction — building a full closed-loop for Markdown creators. Expect more focused tools to land in this category over time.