User-Agent & Device Inspector
Inspect your browser's current User-Agent string, parse external UA headers, detect OS versions, rendering engines, device types, and view live client viewport metrics.
The User-Agent & Device Inspector is a fast, accurate Developer utility designed to inspect your browser's current user-agent string, parse external ua headers, detect os versions, rendering engines, device types, and view live client viewport metrics. entirely in your browser with zero server data storage.
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Systems & Security Engineers • Applied Cryptography & High-Performance Web Tools
How to Use User-Agent & Device Inspector
Inspect your current browser
The inspector automatically reads and parses your active browser User-Agent and device capabilities.
Paste any external User-Agent
Paste UA strings from logs, Googlebot crawlers, or mobile apps to decode their platform and engine specifications.
Check hardware diagnostics
Review your active viewport dimensions, device pixel ratio (Retina scaling), touch points, and timezone.
Frequently Asked Questions (PAA)
Related Tools & Converters
Authoritative Standards & Citations
Calculations and algorithms on this page are implemented and verified in strict accordance with the following official technical specifications:
RFC 7519: JSON Web Token (JWT)
Standardized compact, URL-safe means of representing claims to be transferred between two parties.
Web Cryptography API Specification
Standard JavaScript API for performing basic cryptographic operations in web applications.
RFC 4122: A Universally Unique IDentifier (UUID) URN Namespace
Definition of uniform format and generation algorithms for UUIDs.