HTML Landmark Outline Viewer
Detects common landmark elements such as main, nav, header, footer, aside, section with labels, and elements…
What the HTML Landmark Outline does
Detects common landmark elements such as main, nav, header, footer, aside, section with labels, and elements with landmark roles. Adjust the controls and the preview updates immediately, so you can dial in exactly what you want and copy the result straight into your project — no build step and no account.
One thing to keep in mind: It is a quick outline viewer. You should still test names, heading order, keyboard behavior, and screen reader output.
Private and in your browser
Everything runs locally in your browser. Your input is never uploaded, so the tool stays fast and works offline, and the copy and download buttons always use the current result shown in the output panel.
Frequently Asked Questions
What does the HTML Landmark Outline do?
Detects common landmark elements such as main, nav, header, footer, aside, section with labels, and elements with landmark roles.
What should I keep in mind?
It is a quick outline viewer. You should still test names, heading order, keyboard behavior, and screen reader output
Does it upload my input?
No. The HTML Landmark Outline runs entirely in your browser — your input is never uploaded, and it keeps working offline once the page has loaded.
Practical utilities for front-end design and implementation work.