HTML Attribute Extractor

Find class, id, data, aria, href, src, and other attributes in pasted markup.

HTML source

Optional attribute-name filterExtracted attributes

ReadyReads attributes present in the pasted markup. It does not compute CSS properties or browser-generated accessibility semantics.

Source & result review

Inspect what the browser parsed and what the tool produced

DOMParser ≠ sanitizer

Ready to inspect source and result.

Review is local and detached: this panel never inserts pasted markup into the live page. A browser parser can normalize malformed HTML, but successful parsing does not make markup safe to inject. Scripts, inline event attributes and embedded browsing/plugin elements are reported as active-content signals, not executed.

Attribute inventory, filters & URL-like value audit

Extract attributes as a source-audit matrix. Filter by element or attribute name, keep each element/attribute/value relationship visible, and flag URL-like attributes and boolean attributes instead of flattening all values into one list.

HTML sourceElement filter (optional)Attribute filter (optional)

—Matched elements

—Attributes

—URL-like values

—Boolean attrs

Ready.

Element	Attribute	Value	Audit role

Parsing uses the browser DOM parser locally. It inventories source structure; it does not fetch referenced URLs or prove that external resources are reachable.

Browser-local does not mean standards-complete

HTML parsing is error tolerant. Source diagnostics, sandboxed previews, and transformations do not replace full conformance, security, or production-browser testing.

Count attributes against the parsed source

The source review reports total parsed attributes and structure while the native extractor returns the requested attribute rows, so an empty extraction can be distinguished from an empty document.

Parser and sanitizer boundary

HTML DOMParser creates a detached document and may repair or normalize markup. That is useful for inspection, but parsing alone does not sanitize untrusted HTML. Review scripts, inline event attributes, embedded content and application-specific URL/context rules before any live-DOM insertion.