User agent checker
Runs in your browser · freeYour user agent, what it says about you, and whether it matches your client hints.
Your user agent
Parsed
Reading…| Browser | … |
| Operating system | … |
| Device type | … |
| Engine | … |
| Client hints: platform | … |
| Client hints: architecture | … |
| Client hints: model | … |
| Client hints: full version list | … |
| User agent vs client hints | … |
What the user agent tells a site
The string looks cluttered because every browser copies parts of older ones for compatibility. The meaningful parts are the platform in the first brackets (for example Windows NT 10.0; Win64; x64) and the browser token near the end (for example Chrome/142.0.0.0).
Chromium browsers now reduce the user agent to a fixed version and platform and move the details into client hints. A site that requests client hints sees your real platform version and architecture, so a changed user agent with unchanged hints is an obvious mismatch.
See every other value your browser reveals with the browser fingerprint test.
User agent FAQ
What is a user agent?
The user agent is a text string your browser sends with every request, naming the browser, its version and your operating system. Sites use it to serve the right page, and as one part of your fingerprint.
What are client hints?
Client hints are the structured replacement for the user agent in Chromium browsers: platform, platform version, architecture, model and full browser versions. Sites can request them, and they must agree with the user agent string.
Why would my user agent and client hints disagree?
Usually because an extension or setting changed the user agent string but not the client hints. Sites check for that mismatch, so changing only the string makes a browser easier to single out, not harder.
Can I change my user agent safely?
Only if everything else changes with it: client hints, navigator.platform, fonts and graphics. That is what an antidetect browser such as NexLogin does per profile.
A consistent user agent for every profile
NexLogin sets the user agent, client hints and platform together for each browser profile, so they always agree.