NDT User-Agent Manager

Switch, validate, and manage User-Agent profiles with a clean, privacy-first workflow.

🧭 NDT User-Agent Manager — Switch & Manage User-Agent Profiles A modern, privacy-first extension for switching, testing, and managing browser User-Agent profiles with a fast and clean workflow. Choose from an up-to-date catalog of browser and device profiles, apply a profile to the current tab or all tabs, create and validate custom User-Agent strings, and inspect the active browser identity using a dedicated test page. ✨ Key Features 🌐 Updated User-Agent Profiles Choose from regularly updated browser and device profiles for desktop and mobile environments. 🔎 Searchable Browser & Device Selector Quickly find the browser, operating system, or device profile you need. ⚡ Apply Instantly Apply a User-Agent profile to the current tab or all open tabs. ⭐ Favorites & Recent Profiles Save frequently used profiles as favorites and quickly access recently used profiles. 📌 Pin Favorite Profiles Pin important profiles to the top of the list for faster access. 🗺️ Per-Site Profile Mapping Assign a specific User-Agent profile to one or multiple domains for automatic per-site switching. 🛠️ Custom User-Agent Create, validate, save, and reuse your own custom User-Agent strings. 🧪 User-Agent Test Page Open a dedicated diagnostic page to inspect the active User-Agent, browser information, and fingerprint-related properties. 🖱️ Context Menu Quick Actions Switch profiles faster using convenient right-click context-menu actions. 📥 Import & Export Settings Back up, restore, and transfer your settings between browsers or devices. 🔄 Automatic Profile Updates Automatically refresh profile data and cache it locally for fast access. 🌓 Light & Dark Themes Switch between Light and Dark themes with multilingual interface support. 🔒 Privacy-First Local Storage Settings, favorites, recent profiles, and domain mappings stay in Chrome storage. 👨‍💻 Built for Developers & Testers NDT User-Agent Manager is designed for developers, QA testers, web professionals, and anyone who needs reliable browser identity testing with a simple and efficient workflow.