Write once, export HTML
Text to HTML uses TipTap in your browser. buildDocumentHtml wraps the body in a DOCTYPE, charset, and shared document CSS so the file opens cleanly. No server round-trip for Copy or Download HTML.
This is not Markdown to HTML (paste Markdown source). It is a visual editor. It is also not HTML to Text (stripping tags).
Privacy
HTML export is local. Only sibling tools that create PDF/images send HTML to ToolPin’s render API. Keep secrets out of the editor if you later click Text to PDF.