Moonly - JavaScript Injector

Inject JavaScript into pages dynamically.

Moonly – JavaScript Injector lets you inject custom JavaScript into any web page. Create scripts, set conditions for when they run, and manage everything through a clean, built-in editor. What you can do: - Write and manage scripts with a full-featured code editor (syntax highlighting, line numbers, bracket matching) - Run scripts manually with one click from the popup, or automatically when a page matches your conditions - Match pages by exact URL, substring, or regex pattern - Control injection timing — before the page loads or after - Import and export scripts as JSON for backup or sharing Built for developers, testers, and power users who want to automate repetitive tasks, test page behavior, or customize their browsing experience. Permissions: - Tabs — detect the active page for script matching - Scripting — inject your JavaScript into pages - Storage — save your scripts locally on your device Scripts are stored entirely on your device and never sent anywhere. Use responsibly — only run scripts you trust.