User-Agent Parser

Decode any user-agent string into browser, version, operating system, rendering engine and device type — instantly, in your browser.

What is a user-agent string?

A user-agent is a header your browser or HTTP client sends with every request, describing the browser, version, OS and rendering engine. Servers use it to deliver compatible content, and anti-bot systems use it to spot non-human clients. A missing or inconsistent user-agent is one of the fastest ways to get blocked when scraping.

User-agent parser FAQ

What does this tool detect?

Browser and version, operating system and version, rendering engine, device type, and whether the UA looks like a bot.

Is it accurate?

UA parsing is heuristic and strings can be spoofed, but this tool follows the conventions used by mainstream browsers and servers.