# User-Agent Parser Decode a User-Agent string into browser, rendering engine, operating system and device type — or analyse your own. Runs entirely in your browser. ### How it works A User-Agent string is how a browser identifies itself to servers. It's a messy, historically-tangled format, so this tool uses pattern matching to pull out the browser, engine, OS and device — the same heuristic approach real analytics libraries use. Where your browser supports the newer *User-Agent Client Hints* API, those higher-confidence values are shown too. Everything is parsed locally. --- *Source: [ocxly.com/user-agent-parser.html](https://ocxly.com/user-agent-parser.html) — OCXLY, free 100% client-side privacy-first tools. Free User-Agent parser. Decode any User-Agent string into browser, rendering engine, operating system and device type, or analyse your own. Runs entirely in your browser.*