AnyTool
Your files never leave your device. All processing happens locally in your browser.

How to edit Markdown with a live preview and export to PDF for free?

Open AnyTool Markdown Editor Pro, type or paste GitHub-Flavored Markdown in the left pane, and watch the right pane render live with code highlighting, KaTeX math, and Mermaid diagrams. Copy HTML, save .md/.html/.png, or print to PDF with no paywall. Everything runs 100% in your browser - no upload, no signup.

  • Live split preview of GFM: tables, task lists, strikethrough, autolinks
  • Prism code highlighting, KaTeX math, and Mermaid diagrams - all self-hosted, no CDN
  • Free export: copy HTML, download .md and .html, save PNG, or print to PDF
  • 100% in your browser - no upload, no signup, works offline

What is

Markdown Editor

A Markdown editor is a writing tool that turns plain-text Markdown syntax into formatted HTML, usually showing the source and a live rendered preview side by side as you type.

Developer Tools

Related terms

GitHub-Flavored MarkdownKaTeX MathMermaid DiagramsMarkdown to PDF

Frequently Asked Questions

No upload at all - parsing, rendering, and export all happen in your browser, and your draft autosaves only to local storage.

The editor is 100% client-side, built on markdown-it, so your text never leaves the device. Your draft autosaves to the browser's local storage, and the tool works offline after first load with no account required.

Yes - print to PDF is free with no paywall, plus copy HTML and save .md, .html, or PNG.

Unlike editors that lock PDF behind a subscription, this tool prints a self-contained styled document straight to PDF for free. You can also copy rendered HTML, download a standalone .html file, save the preview as a PNG, or export the raw .md.

Yes - KaTeX inline and display math, plus Mermaid flowcharts, sequence, and gantt diagrams.

Write inline math with single dollar signs and display blocks with double dollar signs, rendered by KaTeX. Mermaid is dynamically loaded only when a mermaid code fence is present, so flowcharts and other diagrams render without slowing down typing.

No - it is a single-user, fully client-side editor with no live collaboration or cloud sync.

Because everything runs locally with no server, there is no Google-Docs-style multi-user editing or account-based cloud sync. You open and save files locally via drag-drop or the file picker, which keeps documents private but means collaboration is out of scope.

Detailed Explanation

How It Works

Client-Side Markdown Editor with Live Preview

AnyTool Markdown Editor Pro is a fully client-side editor that renders GitHub-Flavored Markdown into a live preview as you type, using the markdown-it engine. It supports tables, task lists, strikethrough, and autolinks, alongside Prism syntax highlighting for 30+ languages, KaTeX math, and Mermaid diagrams. A formatting toolbar and Ctrl-key shortcuts insert bold, italic, links, code, headings, lists, tables, and diagrams.

  • Built on markdown-it with html:false so pasted content cannot run scripts
  • Split, edit-only, and preview-only view modes
  • Line-mapped scroll-sync plus a clickable heading outline
  • Live stats: words, characters, lines, paragraphs, reading time, headings, links, images, code blocks, and task progress
Use Cases

Free Export to HTML, PNG, and PDF

The editor exports without any paywall or signup. Users can copy rendered HTML, copy raw Markdown, download a self-contained .html document, download the source .md, save the rendered preview as a 2x PNG via html2canvas, or print to PDF. PDF export opens a standalone styled document and calls the browser print dialog, preserving selectable vector text rather than rasterizing it.

  • Print-to-PDF keeps selectable text instead of a flattened image
  • Exported .html is self-contained with inlined print CSS and KaTeX styles
  • PNG export renders at 2x scale for sharpness
  • No subscription gate on any export format
Privacy & Security

Privacy Model and Client-Side Limits

All parsing, rendering, math, diagrams, and export run in the browser; the document never uploads and autosaves only to local storage, working offline after first load. KaTeX, Prism, and Mermaid assets are bundled rather than loaded from a runtime CDN. As a pure client-side tool it offers no real-time multi-user collaboration and no account-based cloud sync, and it cannot fetch arbitrary remote Markdown by URL due to cross-origin restrictions.

  • No server, no upload, no tracking, no signup
  • Draft autosaves to browser local storage and survives reload
  • No live collaboration or cloud sync by design
  • Files open and save locally via drag-drop or the file picker
AnyTool Markdown Editor Pro vs typical online alternatives
CapabilityAnyToolTypical alternative
Privacy / no uploadYes - 100% client-sideOften server-stored
PDF exportFree, no paywallOften paid or gated
Math and Mermaid diagramsKaTeX plus Mermaid built inFrequently missing one
Runtime CDN for assetsNo - self-hosted, works offlineOften CDN-dependent
Signup requiredNoOften for sync or export

Real-time multi-user collaboration is out of scope for a pure client-side editor.