This is a single self-contained HTML file. It has no external dependencies, no npm packages, no install process, and no server.
Best use: editing static HTML pages, sales pages, bonus pages, simple landing pages, email snippets, and content-heavy HTML documents.
Follow selection: when you click or type in the visual page, the source panel jumps to the matching HTML block and selects it, so you can see exactly where the edit is happening.
Saving: in modern Chromium browsers, direct save may work when opened through the file picker. Otherwise the tool downloads a fresh edited .html copy.
Important browser limit: when you load a local HTML page, the browser may not automatically resolve that page's neighbouring local CSS/image files. Inline CSS and absolute asset URLs work best. The source is still editable either way.