User-Agent Parser
Free online User-Agent parser tool, detect browser and device
What is a User-Agent String?
A User-Agent string is sent by your browser with every HTTP request to identify itself. It contains information about the browser, operating system, device, and rendering engine. Websites use this information to serve appropriate content and detect bots.
How to Parse User-Agent Strings
Paste a User-Agent string in the input field. The tool identifies the browser name and version, operating system, device type (desktop/mobile/tablet/bot), and rendering engine. This is useful for debugging device-specific issues and analyzing traffic logs.
▶Why is my browser's User-Agent so long?
User-Agent strings have grown over decades of browser competition. Modern browsers include compatibility tokens (like Mozilla/5.0) for historical reasons, plus details about the engine, OS, and browser version.
▶Can User-Agent be faked?
Yes, browsers and tools can send any User-Agent string. This is called User-Agent spoofing and is commonly used for testing mobile layouts or accessing device-specific content.
▶What is User-Agent Client Hints?
Client Hints are a modern replacement for User-Agent strings, providing structured HTTP headers instead of a single string. They offer better privacy control while still providing necessary browser information.