Auto-Detection · Device Breakdown · Engine & OS
User Agent Parser & Detector
Decode browser headers into actionable device attributes. Inspect browser brand, release build, rendering engine, and operating platform.
Presets:
Browser
Unknown
Operating System
Unknown OS
Device Category
Desktop
Rendering Engine
Unknown Engine
What is an HTTP User Agent Header?
An HTTP User-Agent is a request header string that web browsers and network clients send to web servers with every request. It tells the host server about the operating environment, device architecture, browser release version, and rendering engine.
Modern web development uses User-Agent headers for diagnostic logging, progressive enhancement, telemetry analysis, and preventing malicious automated scrapers from overwhelming cloud infrastructure.