Write and preview side by side. Every keystroke re-renders the preview — headings, bold and italic, lists, tables, task lists, blockquotes, and links — across three editing modes: split source, instant render, and full WYSIWYG.
Export pixel-perfect PDF and HTML. The PDF path uses the browser's own text engine for correct baselines, with smart page breaks that avoid splitting tables, code blocks, and diagrams across pages.
Import Markdown, HTML, and Word. Drop in a .docx file and it's converted to clean Markdown in your browser — the file is never uploaded anywhere.
Render math and diagrams inline. Write LaTeX inside $...$ or $$...$$ for KaTeX formulas, and use a ```mermaid fence for flowcharts, sequence, and Gantt charts.
Work offline, your way. Once loaded, the editor keeps running without a network connection, with dark and light themes and full keyboard shortcuts.