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Advanced User-Agent switcher with multi-level control, featuring built-in, custom, append text, and random UA modes. UA Switcher Pro is an advanced User-Agent (UA) switcher designed for developers, testers, and privacy-conscious users. It offers an unprecedented multi-level rule control system (Global, Domain-specific, and Tab-specific) and four flexible UA switching modes (Built-in, Custom, Append Text, and Random). Combined with a rich built-in UA library, powerful customization features, and zero-delay switching technology, it allows you to manage your browser's identity with ease and precision. Whether you need to debug mobile compatibility, bypass website restrictions, or enhance your online privacy, UA Switcher Pro provides the most reliable and flexible solution. ✨ Core Features 1. 🚦 Powerful Three-Tier Rule System Our unique "Tab > Domain > Global" priority rule system offers you ultimate flexibility and precise control: Global Rule: Set a default UA that applies to all websites you visit. Domain Rule: Assign a specific UA for a particular website (e.g., *.google.com or example.com), which overrides the global rule. Tab Rule: Set a temporary UA for the current tab only, which expires when the tab is closed. It's the perfect choice for quick tests or one-time visits and has the highest priority. 2. 🎭 Four Flexible UA Modes Freely choose the most suitable UA switching mode based on your needs: Built-in Mode: We have curated a library of over 200 real device UAs across 15 major categories, including the latest desktop browsers for Windows/macOS/Linux, mobile devices for iOS/Android, game consoles (PlayStation/Xbox/Switch), smart TVs, and even in-app browsers for specific applications like WeChat and TikTok. Custom Mode: Easily add, manage, and categorize your own UA strings to build a personalized library. Append Mode: Add a custom string to the end of your browser's original UA, ideal for traffic tagging or specific A/B testing scenarios. Random Mode: Automatically rotate UAs from a predefined pool (e.g., mobile devices only, or from your custom library) for each request or tab, significantly enhancing your anonymity. 3. ⚡️ Advanced Technology, Zero-Delay Switching Built on Manifest V3: Utilizes the latest Chrome extension standard for enhanced security and performance. Zero-Delay Rule Application: By leveraging the declarativeNetRequest API and an innovative "rule pre-registration" mechanism, we ensure the UA is modified before the network request is sent, fundamentally preventing any real UA leakage. Comprehensive Spoofing: Not only does it modify the User-Agent in HTTP headers, but it also spoofs JavaScript properties like navigator.userAgent and navigator.platform to bypass advanced detection methods. 4. 🛠️ Professional Configuration Management Import & Export: Easily back up all your rules and custom UA libraries, or share configurations with your team. Remote Configuration: Load configuration files from a URL for centralized team management and dynamic updates. Category Management: Organize your custom UAs and appended texts into categories to keep your library neat and tidy. 🎯 Why Should You Install UA Switcher Pro? 👨💻 For Web Developers and Testers: Efficient Debugging: Quickly simulate various desktop and mobile browsers to test responsive layouts and compatibility without switching devices. 🕵️♂️ For Privacy-Conscious Users: Protect Your Digital Fingerprint: Reduce the uniqueness of your browser fingerprint by frequently and randomly changing your UA to prevent cross-site tracking. Access Restricted Content: Some websites limit content based on the User-Agent (e.g., mobile-only access). This extension allows you to bypass these restrictions easily. 📊 For Content Creators and Data Analysts: Simulate Different Devices: Understand how your content appears on various devices and platforms. Data Scraping: Mimic specific devices or crawlers to gather data more effectively and reliably. We are dedicated to creating a powerful, high-performance, and user-friendly User-Agent management tool. Install UA Switcher Pro now and experience unparalleled freedom in controlling your browser's identity! 🎉
ScriptCat
Everything can be scripted, allowing your browser to do more! ScriptCat, a browser extension that can execute user scripts, everything can be scripted, allowing your browser to do more things! We built a framework for executing background scripts and Greasemonkey/Tampermonkey scripts based on the design ideas of Greasemonkey/Tampermonkey. It also has several unique APIs that enable scripts to do more. Furthermore, we provide a fantastic online editor that makes script code development more pleasant and easy. **Please Star it if you find it useful. ❤❤❤** - Cloud Sync: script recovery is easy when changing or reinstalling browser - Scripts subscription: creating your own script collections or enabling multiple scripts to work together. - Compatibility: allowing seamless migration from other userscript managers. - Background scripts: allowing your scripts to run continuously in the background. - Scheduled scripts: allowing for daily scheduled tasks. You can use them for automatic check-ins, timed reminders, and more. - Rich API: more powerful APIs than other managers, which can realize more functions. - Sandbox mechanism: ensuring user safety, script permissions are granted only with user consent. - Excellent editor: providing API auto-completion and ESLint. - Nice UI
User-Agent Switcher: Device Identity Simulator
Simulate different device fingerprints for testing purposes Summary: Simulate different device fingerprints (User-Agent, Screen, Canvas) for testing and debugging purposes. Description: Device Identity Simulator allows developers and QA engineers to easily simulate various device identities directly from their browser. Test how your website responds to different devices without needing physical hardware. 🖥️ Device Simulation: Switch between 11 preset devices including Desktop, Laptop, Mobile, and Tablet. 📱 Advanced Fingerprint Spoofing: Automatically modifies User-Agent, Client Hints (Sec-Ch-Ua), Screen Resolution, Canvas, and WebGL fingerprints. 🔒 Full Client Hints Support: Correctly spoofs Sec-Ch-Ua, Sec-Ch-Ua-Platform, and Sec-Ch-Ua-Mobile to bypass modern fingerprinting. 🧹 Auto-Clean: Automatically clears Cookies and Storage when switching devices to ensure a clean testing environment. 🔄 Auto-Refresh: Automatically reloads the page to apply new device settings immediately. 🌍 Multi-language Support: Available in English, Chinese, Spanish, German, and French. Privacy Policy: This extension operates entirely locally. No user data is collected or sent to external servers.
UA Switcher
Switch your browser's User-Agent globally or per-site, with advanced anti-detection features. Switch your browser's User-Agent globally or per-site, with advanced anti-detection features.
User-Agent Switcher by Semalt
User-Agent Switcher by Semalt lets you change your User-Agent fast and view any site as if browsing from another browser or device. User-Agent Switcher by Semalt lets you quickly and conveniently switch the User-Agent to view a site as if you were using another browser or device. A User-Agent is a string your browser sends to a site in the HTTP header and via navigator.userAgent. Servers and scripts can use it to identify the browser and device type and, if needed, deliver different content or apply different rules. With User-Agent Switcher by Semalt, you can easily switch—right inside Chrome and in just a few clicks—to built-in User-Agent profiles for various operating systems, browsers, search engines, devices, and more. ➋ Who can benefit from extension? ➣ Front-end engineers & QA — reproduce issues and test UA(User-Agent)-based redirects, polyfills, and responsive breakpoints without real devices. ➣ Technical SEO teams — check mobile/desktop parity, detect UA(User-Agent)-based cloaking, verify server rules that vary by User-Agent, quick spot-checks for Googlebot rendering (note: this doesn’t make requests from Google; it only changes the header). ➣ Product managers — validate rollouts or fallbacks for legacy browsers before launch. ➣ Customer support — quickly reproduce a user’s environment to triage bugs. ➣ Analytics/MarTech engineers — confirm tracking, tag firing, and AB test buckets that depend on User-Agent. ➣ AdOps/Monetization — verify ad tags and responsive placements under mobile/desktop User-Agents. ➣ Security/testing teams — assess allow/deny rules, WAF behavior, and rate-limit logic tied to User-Agent. ➣ Automation testers — run scripts that must declare a specific User-Agent for compatibility. ➌ How to install the extension? It takes 5 (literally) seconds to install this extension in just several clicks: - Click #1 — Hit the Add to Chrome button - Click #2 — Add the extension - Click #3 — Click the Extensions button next to your profile pic - Click #4 — Pin User-Agent Switcher by Semalt to your toolbar by hitting the pushpin icon And now it’s there. ➍ How to get started with extension? Open the website for which you want to change the User-Agent, then left-click the User-Agent Switcher by Semalt icon in your Chrome extensions menu. Next, choose the desired User-Agent and apply it to: a) only the current tab, or b) all newly opened tabs. ➎ About Semalt Semalt has been providing SEO analytics data and SEO services since 2013. We’ve helped over 600,000 businesses grow so far and are ready to help yours. Learn more about Semalt at semalt.com/about. ➏ Privacy Policy Your privacy means everything to us. User-Agent Switcher does NOT collect data on how you use Chrome, search, or navigate websites. It only uses the URL of the web page you enable it on, as well as additional elements associated with this page. Learn more about Semalt’s Privacy Policy at semalt.com/privacy-policy. ➐ Support If you have any questions, comments, or suggestions, contact us at extension@semalt.com or go to our Support page - semalt.com/support.
