CSS Variable Extractor

Find repeated values in your CSS and turn them into custom properties with a root block.

Extract repeated values

Minimum uses: 2

Repeated values: — · declarations rewritten: —

Only values that appear at least as often as the minimum are extracted, and longer values are replaced first so shorter ones never cut into them.

Paste the stylesheet you want to clean up into the CSS box.
Set the minimum number of uses a value needs before it becomes a custom property.
Copy the root block and the rewritten rules, then paste them back into your stylesheet.

Common questions about the free online css variable extractor.

It scans your stylesheet for values that repeat, suggests a custom property name for each one and rewrites the rules to use those variables.

Hex, rgb and hsl colours, plus length values such as pixels, rem, em, percentages and viewport units that repeat often enough.

Colours become color variables, font sizes become font size variables and other lengths become space variables, each with a number suffix.

It appeared fewer times than the minimum uses setting, so the extractor treated it as a one off rather than a shared token.

Yes. Rename them in the root block and use the same new name in the rewritten rules, since both are plain text in the output box.

It reads plain CSS text, so the output is standard CSS. Preprocessor variables need converting to custom properties first.

No. Everything is scanned locally in your browser and nothing you paste leaves your device.

Yes. It is completely free, runs locally in your browser and needs no account, no sign-up and no upload.

Last updated: October 10, 2026