User Agent Parser: Analyze Browser and Device Information
User agent strings contain information about browsers, operating systems, devices, and software making web requests. Our User Agent Parser decodes user agent strings, extracting detailed information about the browser, OS, device type, and rendering engine. This is essential for web developers, analytics, debugging, and understanding what technologies your visitors are using.
How it works
Paste a user agent string into the parser, or the tool can detect your current browser's user agent automatically.
The parser analyzes the user agent string using pattern matching and known browser/OS signatures.
Information is extracted and displayed: browser name and version, operating system, device type (desktop, mobile, tablet), and rendering engine.
Additional details may include screen resolution capabilities, JavaScript support, and other browser features.
Results help you understand the client environment making the request.
Why it matters
Debug web issues by understanding what browsers and devices your users are using.
Optimize websites for specific browsers or devices based on user agent data.
Analyze traffic by parsing user agents to understand your audience's technology stack.
Implement browser-specific features or workarounds based on detected capabilities.
Test and verify that user agent detection is working correctly in your applications.
FAQ
What is a user agent string?
A user agent string is text sent by browsers and applications to identify themselves to web servers. It typically includes browser name, version, operating system, and device information.
Can user agent strings be spoofed?
Yes, user agent strings can be changed or spoofed by users or applications. Don't rely solely on user agent strings for security or critical functionality - use feature detection instead when possible.
Why do user agent strings look so complex?
User agent strings have evolved over decades and include information for compatibility with various websites. They often contain multiple browser names and versions for backward compatibility, making them appear complex.
Open the interactive tool on this page after JavaScript loads, or contact us if something is broken.