Enter a user-agent string above to parse it.
A user-agent string is a line of text a browser sends with every request, identifying itself — including the browser name and version, the operating system, and the rendering engine. Servers use it for analytics, feature detection, and compatibility decisions.
Common uses: debugging a bug report that includes a UA string, verifying what a server-side log identified a visitor as, or checking how a custom or unusual UA string (e.g. from an API client or bot) gets classified.
Mostly, but not perfectly — user-agent strings can be spoofed or customized, and newer browsers increasingly freeze or reduce UA string detail (User-Agent Client Hints) for privacy reasons. Treat the result as a best-effort identification, not a guarantee.