HTML Visualizer

Paste any HTML and see the full DOM tree laid out with colors, indentation, and all attributes. This free online HTML visualizer makes understanding nesting and hierarchy way easier than staring at raw markup. Inspect HTML structure, validate markup, check accessibility, and analyze DOM hierarchy without DevTools.

HTML gets deeply nested fast, and trying to keep track of which tag closes what just by reading raw markup gets old quick — especially when you're dealing with templates or markup someone else wrote. This visualizer takes your HTML and turns it into a clean, color-coded tree structure. Each element type gets its own color, attributes are shown right next to their tags, and text content is previewed inline so you can see what's actually in there. The result is a bird's-eye view of the DOM hierarchy where parent-child relationships, sibling elements, and deeply nested sections are obvious at a glance. It's useful for debugging stubborn layout issues, teaching someone how the DOM works, untangling inherited markup, or just satisfying your curiosity about how a particular piece of HTML is structured. All parsing happens client-side, so your code never leaves your browser.