User Agent
Your browser's user agent string and what it reveals.
…About the User Agent Tool
The User Agent tool shows your browser's User-Agent string along with parsed details — browser name and version, engine (Blink, Gecko, WebKit), OS, device type and any client-hints your browser exposes. The User-Agent header is what your browser sends to every web server on every request, and it's the primary signal servers use for device detection, analytics, and (still, unfortunately) some feature-gating.
Web developers use this tool to confirm what their local browser is reporting during cross-browser testing, to compare Chrome vs Safari behavior, to debug user-agent-conditional CDN rules, and to verify that browser overrides (via devtools) are being applied correctly. Support engineers use it when triaging customer bug reports — 'what browser are you on?' becomes 'paste this URL', which is faster and more accurate than asking the user to look at their About screen.
Modern browsers are gradually freezing and reducing the amount of information in User-Agent (User-Agent Reduction in Chrome, Intelligent Tracking Prevention in Safari). The parsed User-Agent Client Hints headers are the future — this tool surfaces both.
How to use this tool
- 1Enter the required value in the input field above (domain, IP, URL, or text depending on the tool).
- 2Click the action button to run the check — results are computed instantly from our edge network.
- 3Review the parsed output, key fields and any warnings shown in the result card.
- 4Copy the result, share the page URL, or jump to a related tool from the sidebar to continue debugging.
Key features
- Full raw User-Agent string
- Parsed browser, engine, OS and device
- User-Agent Client Hints where supported
- Screen size and viewport information