User-Agent Parser
④ API / Debug
What it is: A User-Agent is the string a browser uses to identify itself. Parse it into browser/OS details here.
When to use: When troubleshooting compatibility issues, or reading UAs in your logs.
Everything runs locally in your browser — nothing is uploaded.
FAQ
What is a User-Agent?
It is a string a browser reports on every request to identify itself, including the browser, version, and operating system. Servers often use it for compatibility decisions or analytics.