W3C CSS Validation

CRX ID

fohjamkfebgpbokdpjgedennphmkbgbo

Description from extension meta

W3C CSS Validator for current page

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Description from store

W3C CSS Validator for the current browser page

Allows you to validate the CSS of a .css page using the service provided by the W3C.

How it works:

- Activate the extension on the desired browser page (it must be a page containing only CSS)

- The extension extracts the content of the current page and copies it into "Validate by direct input" of the CSS Validation Service (https://jigsaw.w3.org/css-validator/#validate_by_input).

- By pressing the "Check" button, the W3C service checks that CSS style validity

This way you can check the compliance of the CSS with the W3C standards.

Vittoria Motzo 2025-03-25: Thanks, now I can directly verify the CSS without having to go through DevTools first, extract it and copy it to the W3C site
Rocco Caruso 2025-03-20: Very useful to check if the written CSS is well formed and respects the W3C standards

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