Agent Switch — User Agent Switcher

Change your browser's User-Agent so websites see you as a different device. 26 presets, or paste your own string.

Agent Switch is a fast, lightweight, and powerful User Agent Switcher extension that lets you easily test website responsiveness, simulate mobile devices, and customize browser headers with a single click. Whether you are a web developer, QA engineer, designer, or privacy-conscious user, Agent Switch makes it simple to switch user agents and test how websites render across different browsers, operating systems, and devices without changing your physical hardware. 🚀 Key Features Instant User-Agent Spoofing: Switch your browser’s User-Agent string instantly with zero page-reload delay. Pre-configured Device Profiles: Access an updated library of popular User-Agents: Mobile: Chrome for Android, Safari on iOS (iPhone & iPad), Android Browsers. Desktop: Chrome, Firefox, Safari, Edge, Opera on Windows, macOS, Linux, and ChromeOS. Search Engine Bots: Googlebot, Bingbot, Yahoo Slurp for SEO testing. Custom User-Agent Creation: Add, edit, and save your own custom User-Agent strings and HTTP headers. Domain-Specific Rules: Set specific User-Agent rules for individual websites or domains. Lightweight & Privacy-Focused: Minimal system memory usage with no tracking or background telemetry. 💡 Popular Use Cases Web Development & Testing: Verify responsive layouts and feature compatibility for mobile vs. desktop versions of your site. SEO Analysis: Inspect how search engine crawlers (Googlebot) render your pages and structured data. Bypass Restrictions: Access desktop-only or mobile-only website features easily. Cross-Browser Debugging: Test site behavior on Safari, Firefox, or Edge directly from Google Chrome. 🛠️ How to Use Agent Switch Click the Agent Switch icon in your browser toolbar. Select your desired platform (Desktop, Mobile, or Bot) or select a custom profile. Reload the page to view the site as your chosen device! Click Reset to return to your default browser User-Agent at any time. 🔒 Privacy & Permissions Agent Switch respects your privacy: Does NOT collect, store, or transmit personal data or browsing history. Only requires basic permissions (declarativeNetRequest or webRequest) strictly necessary to modify HTTP request headers. Download Agent Switch today and streamline your cross-device web testing!