What is my user agent?
The user agent string tells websites which browser and device you appear to be using. It is sent automatically with Hypertext Transfer Protocol requests.
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User-Agent string
What the user agent string is
The user agent is a text string your browser sends with HTTP requests to describe itself. Sites use it for compatibility, analytics, and (historically) fine-grained browser sniffing.
Modern browsers intentionally freeze or shorten parts of the string to reduce passive fingerprinting. What you see here is what this visit sent—not a secret identifier we invented.
Changing or hiding it
Developer tools, extensions, and some privacy browsers can override the user agent. Completely disabling it is not how HTTP works; clients always send some form of identification unless a custom client omits it.
Spoofing can break sites. Prefer updated browsers over fake strings when possible. Related tools parse browser, version, OS, and device from the same string.
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Frequently Asked Questions
What is a user agent?
A user agent is a text string your browser sends with every request. It describes the browser, engine, and often OS or device so websites can adapt content or diagnose compatibility issues.
How do I change or spoof my user agent?
- Chrome/Edge:DevTools (F12) → Cmd/Ctrl+Shift+P → “Show network conditions” → uncheck “Use browser default” and pick a UA.
- Firefox:about:config → general.useragent.override (create as string).
- Safari:Develop menu → User Agent.
- Extensions:can also set a custom UA.
- Clear the override to restore the default.
Can I disable the user agent?
No. Browsers always send a User-Agent header. You can only change its contents, not remove it entirely.
Why do modern browsers shorten the user agent?
Browsers reduce detail to limit fingerprinting and compatibility hacks. You may see generic tokens even though your real browser version is newer.
Is the user agent private?
It is sent to every site you visit and is not a secret. Avoid pasting a full user agent into public posts if you are worried about fingerprinting.