▚ sandboxmax

Technical Documentation Renderer

Pre-loaded with the constructs technical writers actually use: warning blockquotes, nested bullet hierarchies, an interactive task checklist (click the checkboxes — they update the markdown source), and dense inline formatting. Everything renders in GitHub's dark documentation style as you type.

runs 100% in your browser — your prose stays private

  1. 1Write markdownType or paste on the left — the macro buttons drop tables, code blocks, and tasks at your cursor.
  2. 2Watch it renderThe right pane re-renders on every keystroke in GitHub’s dark style, scroll-synced to the editor.
  3. 3Copy the HTMLWord and character counts update live; one click copies the rendered HTML markup.

Live preview — GitHub dark

Parsed and rendered entirely in this tab by a built-in sanitizing markdown engine — your prose is never sent anywhere. Tip: the rendered checkboxes are clickable and update the markdown source.

More markdown tools

Is it safe to paste sensitive data into the Technical Documentation Renderer?

Yes. The Technical Documentation Renderer runs 100% client-side inside your browser thread — nothing you paste is uploaded, logged, or transmitted. SandboxMax is a static site with no backend server, no cookies, and no trackers: open your browser's network panel while you work and you'll see zero requests leave the tab.