SnapMonkey is a lightweight userscript manager that lets you install, manage, and execute .user.js scripts to customize any website.
Free. No account required.
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A full-featured userscript manager built on modern web standards.
Browse and install scripts from GreasyFork directly inside the extension. Search, sort, and preview before installing.
Built-in editor with syntax highlighting, dark and light themes, adjustable font size, and keyboard shortcuts.
Built on the latest extension platform. Future-proof, secure, and approved for Chrome Web Store.
One extension for Chrome, Firefox, and Edge. Same features, same interface everywhere.
GM_getValue, GM_xmlhttpRequest, GM_addStyle, GM_notification, and all standard APIs. Works with any userscript.
Back up all scripts, values, and settings to a JSON file. Restore or transfer between browsers.
Three steps to customize any website.
Add the extension to your browser from Chrome Web Store, Firefox Add-ons, or Edge Add-ons.
Browse the built-in GreasyFork store or paste any .user.js URL. Review permissions before installing.
Visit any matching website and your scripts execute automatically. Toggle scripts on or off from the toolbar popup.
Free, lightweight, and private. No accounts, no tracking, no data collection.