CSS Cascade Inspector
Paste HTML and CSS, select an element in the isolated preview, and inspect which declaration wins for each property and why.
CSS Cascade Inspector
Paste HTML and CSS, select an element in the isolated preview, and inspect which declaration wins for each property and why.
About the CSS cascade verdict
The browser supplies the final value
The inspector reads adopted CSS rules, selector matches, inline styles, and getComputedStyle from the isolated preview. The explanation model never replaces the browser's computed result.
Unsupported evidence stays visible
Version 1 does not fully explain layers, conditional at-rules, pseudo-elements, animation, or shorthand expansion. It marks those limits instead of inventing a winner.
FAQ
Common questions and answers about this topic.
What decides which CSS declaration wins?
Within the supported author-style scope, the inspector compares !important, inline style, selector specificity, and source order in that sequence.
Does the tool upload or execute my code?
No. Processing stays in your browser. Scripts, remote resources, forms, nested frames, and navigation are blocked in the preview.