User Agent Parser & Analyzer - Detect Device, Browser & Operating System
Decode and analyze HTTP User-Agent strings. Parse raw browser headers to accurately isolate operating systems, browser families, client layouts, system platforms, and device types (Desktop, Mobile, Tablet, or Bot) with detailed descriptions.
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How to use HTTP User-Agent Parser Online
Step 1: Paste any raw HTTP User-Agent header string, web-scraping token, or crawler identity into our parser workspace.
Step 2: Inspect the real-time organized cards detailing identified browser, engine, OS, device, and bot credentials.
Step 3: Read comprehensive educational explanations of each string component to learn why browsers send legacy tokens.
Frequently Asked Questions
Why do modern User-Agent strings contain legacy references like 'Mozilla/5.0' and 'Safari'?
Due to historical browser wars, web servers frequently blocked browsers that didn't declare specific engine compatibility. To ensure content was rendered correctly, browser developers added legacy tokens (like 'Mozilla/5.0' or 'like Gecko') to their headers, a practice of backward compatibility that persists to this day.
What are User-Agent Client Hints and how do they differ from UA strings?
User-Agent Client Hints (UA-CH) is a modern web standard designed to replace traditional, privacy-invasive User-Agent strings. UA-CH lets browsers share system specifications (like browser name and OS) incrementally only when explicitly requested by the server via HTTP response headers.
Is my browser User-Agent parsed on a server?
No. All string splitting, regular-expression matching, and token decoding are processed fully client-side inside your browser sandbox, keeping your browser identity completely private.