Question 1

What are CSS custom properties (variables)?

Accepted Answer

CSS custom properties, also known as CSS variables, are entities defined by CSS authors that contain specific values to be reused throughout a document. They are set using the -- prefix (e.g., --primary-color: #00d4ff) and accessed using the var() function.

Question 2

What does this CSS Variable Visualizer do?

Accepted Answer

This tool extracts all CSS custom properties from your stylesheet, classifies them by type (colors, fonts, sizes, other), shows visual previews like color swatches and size bars, maps dependency trees for variables referencing other variables, and lets you export a clean organized list.

Question 3

Is this tool free and private?

Accepted Answer

Yes, QTool.io's CSS Variable Visualizer is 100% free and runs entirely in your browser. No CSS data is sent to any server. There is no signup required and no usage limits.

Free CSS Variable Visualizer

Need something more powerful?

QTool.io on GitHub