Add CSS - Custom Style Injector

Very lightweight extension to add CSS into websites. Inject custom CSS into any domain instantly.

Add CSS - Custom Style Injector is a powerful, lightweight, and developer-friendly browser extension that allows you to inject custom CSS styles into any domain or specific URL. Features: Toggle with Ease: Quickly enable or disable individual styles, or use the Global Toggle to turn off all customizations at once. Search & Filter: Easily find your custom styles among dozens of entries using the built-in search bar. Import & Export: Move your custom styles between different browsers or backup your data with a single click via JSON files. Privacy Focused: No tracking, no external servers. Your custom styles are stored locally in your browser.