Safe and non-destructive editing
CSS Hero is a live WordPress Theme editor that works without modifying any of your theme files. It is widely compatible with many environments and it is built to be light and tolerant.
No performance degradation
From a technical standpoint, CSS Hero only generates and enables a single, static extra CSS stylesheet that cleanly overrides your Theme’s original stylesheet.
CSS Hero does not physically alter theme/plugin files in any way. Shut down the plugin and your site’s looks will revert to what they were before installing this tool. It’s 100% safe.