Network & Web Tools
User Agent Parser Online Free
Parse a browser user-agent string to identify the likely browser, operating system, device type and engine family.
browser
Other or unknown
os
Other or unknown
device
Desktop
engine
Unknown
About this tool
A user-agent string is sent by browsers to describe aspects of the client environment. This parser provides a simple browser-side interpretation of common strings. Modern user agents can be intentionally generic and should not be treated as a reliable identity or security signal.
Common use cases
- ✓ Inspect the user agent reported by your current browser.
- ✓ Review a user-agent value copied from logs.
- ✓ Test basic desktop, tablet and mobile classification.
- ✓ Explain browser-identification concepts during debugging or training.
How to use it
- Use the automatically detected string or paste another user agent.
- Review the likely browser, operating system, device and engine.
- Compare the result with actual device information when accuracy matters.
- Avoid using user-agent parsing as the only feature-detection method.
Important interpretation notes
- • User-agent detection is heuristic and can be spoofed.
- • Browsers increasingly reduce identifying detail for privacy.
- • Use capability detection for application behavior whenever possible.
Related Network & Web Tools
Frequently asked questions
What is a user-agent string?
It is an HTTP header value that describes the client software in a conventional text format.
Can a user agent identify a person?
No. It describes software and device characteristics, not a verified individual identity.
Can user agents be changed?
Yes. Browsers, extensions, automation tools and proxies can modify them.
Why does Chrome mention Safari?
User-agent strings retain historical compatibility tokens expected by websites.
Should I use user-agent detection for responsive design?
Usually not. CSS media queries and feature detection are more reliable.
Is the parsing done locally?
Yes. This parser runs in the browser and does not need the network API.