Browser & OS
User-Agent Parser & Device Inspector
Parse any HTTP User-Agent string to inspect browser engine, operating system version, device categories, and search engine crawler identities.
User-Agent Parser & Device Inspector100% In-Browser Detection
Decode browser, operating system, rendering engine, and bot crawlers from any HTTP User-Agent string.
User-Agent String
Browser
Unknown Browser
vUnknown (Unknown Engine)
Operating System
Unknown OS
Version: Standard
Device Category
Desktop
Generic PC
Crawler / Bot Status
Real Human User
Standard interactive web browser
Automatic Active Browser Detection
Browser & Engine Breakdown
Bot & Crawler Verification
1-Click JSON Diagnostic Export
How to Use User-Agent String Parser & Client Inspector (Step-by-Step Guide)
No software installation required. Complete your task in 3 easy steps directly in your browser.
1
View Current or Paste UA
Automatically inspects your active browser or allows testing any custom User-Agent.
2
Examine Diagnostic Cards
Review detailed cards for Browser, OS, Hardware, and Bot Crawler status.
3
Copy Structured JSON
1-click copy the parsed data in structured JSON format for debugging or logging.
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Got Questions?
Frequently Asked Questions
A User-Agent is an HTTP request header sent by web browsers and crawlers that identifies the browser vendor, version, and operating system.