About CSS Guardrail
Clients make changes. Freelancers apply quick fixes. Even experienced developers sometimes need to edit CSS directly on a live WordPress site. One missing brace or broken declaration can damage a layout instantly.
CSS Guardrail is a production CSS safety net for WordPress. It checks code before WordPress saves it, blocks dangerous mistakes, flags suspicious changes, and automatically keeps a rollback ready in case something still goes wrong.
Built for developers, freelancers, and agencies managing production websites, CSS Guardrail adds protection without changing the familiar editing workflow.
It works with the WordPress Theme File Editor and Additional CSS, provides accurate line-level feedback, maintains a backup history, and makes previous versions easy to preview, download, or restore.
Edit live CSS with a guardrail—not crossed fingers.
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