Immersive Markdown editing
Headings, emphasis, strikethrough, inline code, quotes, lists, tasks, links, tables, YAML Front Matter, and math render in place. Source mode remains one shortcut away.
The Format menu handles inline marks; the Paragraph menu handles headings, body text, quotes, code blocks, formula blocks, lists, horizontal rules, table insertion, and paragraph insertion.
Code, JSON, Mermaid, math, tables, and images
Use multi-language syntax highlighting, optional line numbers, JSON indentation guides and folding, offline KaTeX rendering, live Mermaid previews, and editable GFM tables. Pasted and dropped images are saved beside the document in assets/; network images are read from their original URLs for display only.
Long documents and safer files
A resizable outline, full-document parsing, recent files, relative Markdown links, same-document heading anchors, recovery snapshots, external-change detection, and save-time disk checks support serious technical writing.
PDF and single-file HTML
Export the full document with active theme styling, code presentation, embedded local images, Mermaid SVG, and KaTeX math intact.