Outline Elements
Visualize page structure by outlining all HTML elements with this debugging tool from DevTools Suite. See element boundaries, nesting depth, and layout containers at a glance.
See Your Page Structure Like Never Before
Outline Elements reveals the hidden structure of any webpage. Color-coded outlines distinguish layout elements, text, links, forms, media, lists, and tables. Advanced features show DOM depth, z-index layers, flex/grid containers, and semantic HTML5 elements - making layout debugging visual and intuitive.
Key Features
Everything you need to understand page structure
7 Element Categories
Color-coded outlines for layout (red), text (green), links (blue), forms (orange), media (magenta), lists (cyan), and tables (yellow). Instantly identify element types.
Custom Color Customization
Customize outline colors for each element category with per-category color pickers. Match your preferred visual scheme or highlight specific element types.
Outline Style Options
Choose between solid, dashed, or dotted outline styles. Adjust width from 1-5 pixels and opacity from 10-100% for the perfect visibility level.
Depth-Based Coloring
Color-code elements by their DOM nesting depth with a 7-level color spectrum. Visualize hierarchy and identify deeply nested elements at a glance.
Z-Index Visualization
Display z-index values directly on positioned elements. Understand stacking contexts and debug overlay issues without inspecting each element manually.
Flex/Grid Detection
Automatic badges identify flex and grid containers with "FLEX" and "GRID" labels. Quickly spot layout containers throughout your page structure.
Semantic Element Highlighting
Highlight all HTML5 semantic elements including article, aside, details, figure, header, footer, main, nav, and section for accessibility auditing.
Box Model Overlay
Show margin and padding visualization on hover. See the complete box model without opening DevTools - perfect for quick spacing checks.
Hover Highlight Mode
Highlight elements as you hover over them for focused inspection. Great for understanding how elements relate to each other in the DOM.
Click-to-Inspect Mode
Click any element to see its tag name, ID, class list, dimensions, display property, and position property in a tooltip that auto-hides after 3 seconds.
CSS Selector Exclusion
Exclude specific elements using CSS selectors. Hide outlines for elements you don't need to see with valid selector validation.
Real-Time Element Counts
See the count of elements in each category with live updates. Mutation observer detects DOM changes for accurate counts.
Instant Visualization
See all element boundaries at once without clicking individual elements.
Layout Detection
Automatic flex/grid badges and semantic element highlighting.
Fully Customizable
Colors, styles, width, opacity - tailor the visualization to your needs.