Beautiful colored documents,
block by block.
BlockDown is a block editor for the kind of crisp, colored documents you wish every tool made — callouts, tables, code, images — with an AI writer and grammar checker built in. Export to Markdown, HTML, or Word.
Block editor
Headings, text, recolorable callouts, tables with resizable columns, code with syntax highlighting, images, and columns.
AI writer
Generate, continue, rewrite, expand, or summarize — and turn rough prose into clean, structured blocks. (Pro)
Grammar checker
Inline suggestions you can accept or dismiss, across your whole document. (Pro)
Yours, everywhere
Cloud documents online, a free offline desktop app, and exports to .md / .html / .docx that keep your colors.