Observed arrival · 2026-09-29
User Agent Inspector keeps the parser in your browser tab
A browser-local tool that interprets user-agent strings and shows their browser, operating-system, device, and crawler claims.
- For
- Developers, SEO practitioners, and support teams
- Worth noticing
- It labels crawler signatures unverified and says confirming Googlebot requires checking the request’s source IP.
Field notes
The page can read the visitor’s own browser string or accept a pasted one, then offers anatomy highlighting, JSON, and raw-string views. Its explanatory sections separate what the string reports—such as browser, engine, operating-system family, device class, or crawler signature—from what it cannot establish, including authenticity, exact device identity, or the user’s identity. The page says detailed Chromium Client Hints are requested only on demand, and caps pasted input at 4,096 characters.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue