Paste HTML and explore the parsed DOM tree with element attributes, nesting depth, and structure.
HTML DOM Tree Viewer turns pasted markup into a browsable hierarchy of parsed elements. It exposes element names, attributes, parent-child nesting, and depth, letting you answer structural questions that raw indentation cannot settle. Use it to locate where a wrapper begins, which element owns an attribute, or how malformed markup was recovered. The main surprise is that the tree can differ from the apparent tag sequence because HTML parsing may implicitly close elements or otherwise repair invalid arrangements. The result describes parsed relationships rather than the original spelling of the source.
When markup is entered, the viewer constructs the hierarchy represented by its elements. Start tags introduce elements, end tags close applicable elements, and attributes remain attached to their owning element. If markup is incomplete or malformed, HTML parsing rules determine the recovered relationships. The displayed result is therefore a parsed tree, not a syntax-highlighted or byte-for-byte copy of the input.
Read each element relative to its displayed parent. Nodes listed beneath the same parent at the same level are siblings, while greater depth marks descent through another ancestor. Follow the branch from the first unexpected node upward to find the tag that changed containment. Source spaces and line breaks do not set DOM depth, so reindenting the input alone cannot change these structural relationships.
HTML defines error-recovery behavior for malformed or incomplete markup. Parsing can implicitly close elements or relocate nodes to produce a tree. Table-related markup and omitted end tags are common places to encounter this. The viewer reports the resulting parent-child structure, so inspect the source around the first branch that differs from your intended nesting.
No. It can confirm parent-child relationships and show which attributes belong to each element, but a tree alone does not calculate CSS layout, paint order, or accessibility behavior. It can narrow a problem to structure. Visual rendering, computed styles, focus behavior, script-driven changes, and accessible names require additional browser inspection and testing.
The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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