Quick CSS

Inject custom CSS into any website. Styles persist across reloads.

Quick CSS lets you inject custom CSS into any website and save it permanently. KEY FEATURES: - Per-site CSS — styles apply only to the site you set them for - Persists across reloads — styles load automatically every time you visit - Global CSS — rules that apply to every website at once - Enable/Disable toggle — turn styles on/off without deleting them - All Sites page — manage, edit, export and import all your saved styles - Import/Export — backup and restore all styles as JSON HOW TO USE: 1. Open any website 2. Click the Quick CSS icon in your toolbar 3. Type your CSS in the text area 4. Click "Save & Apply" — styles apply instantly, no reload needed Perfect for: fixing broken layouts, dark mode tweaks, hiding annoying elements, typography improvements, and any personal web customization. No account required. No data sent anywhere. All styles stored locally on your device.