User Agent Finder to Check Your Browser User Agent String

Every time your browser asks a website for a page, it introduces itself with a short line of text called a user agent string. That line names the browser, the rendering engine and the operating system, and sites quietly use it to decide what to send back. The User Agent Finder simply shows you your own string, exactly as websites receive it, so you can read it, understand it and copy it when someone asks for it.

What a User Agent String Is

A user agent is any software that retrieves web content, and for most people that means their browser. The string it sends is a compact identity card, for example: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0 Safari/537.36. Oddly, it name-checks browsers you are not using. Those extra names are historical compatibility tokens: years ago sites served their best pages only to certain browsers, so everyone else started claiming those names too, and the habit stuck.

What This Finder Shows You

• Your complete user agent string, displayed exactly as your browser sends it.
• A Copy button so the string can be pasted into a support ticket or email without transcription errors.
• An instant result, because the string belongs to the browser you are using right now; open the page in a different browser or device and the result changes accordingly.

How to Find Your User Agent

1. Open this page in the browser whose user agent you want to check.
2. Look at the string displayed by the User Agent Finder; that is the exact text websites receive from this browser.
3. Read the sections in brackets to identify the operating system and device type mentioned.
4. Click Copy to copy the string to your clipboard.
5. Paste it wherever it is needed, such as a bug report, a support chat or your testing notes.
6. Repeat in another browser or on your phone if you need to compare strings across devices.

Reading a User Agent String Part by Part

Using the example above: Mozilla/5.0 is the legacy token almost every browser still sends. The bracketed section, Windows NT 10.0; Win64; x64, describes the platform: a 64-bit Windows system. AppleWebKit/537.36 is the rendering engine lineage, and Chrome/126.0 gives the actual browser and its version. The trailing Safari/537.36 token is another compatibility leftover. Once you know this pattern, strings from phones and tablets become readable too; a phone string typically names the device model and Android or iOS version inside the brackets. For a friendlier breakdown of the same information, the What's My Browser tool presents your browser details in plain language.

When Knowing Your User Agent Matters

Support teams ask for it constantly, because a bug that appears in one browser version may not exist in another, and the string settles the question in seconds. Developers and testers use it when a site behaves differently on a phone than on a desktop, or when checking that a browser extension or a test tool is presenting the identity it should. It also explains everyday mysteries: if a site serves you a simplified mobile layout on a tablet, the user agent is almost certainly why.

Tips and Common Misunderstandings

• A user agent is not personal data. It describes a browser and device class, not a person; it contains no name, email or account details.
• It can be changed. Browser settings, extensions and developer tools can present a different string, so websites treat it as a hint rather than proof. Never build security decisions on it alone.
• Do not edit a copied string by hand. One wrong character makes it useless for diagnosing a problem; always use the Copy button.
• Compare like with like: the same browser on two operating systems sends different strings, which is normal.

Your user agent also travels alongside your IP address; if you want the other half of what sites see, What's My IP shows the address your connection presents.

User Agent Questions Answered

Why does my string mention Mozilla and Safari when I use Chrome?

Those names are compatibility tokens inherited from the early web, when sites checked for specific browsers before serving modern pages. Chrome includes them so those checks still pass; the token that reflects your real browser is the Chrome one with its version number.

Can a website see my user agent?

Yes. Your browser sends the string automatically with every page request, and sites use it to adapt layouts, offer the right download or record anonymous usage statistics.

Does my user agent reveal my location?

No. Location clues come mainly from your IP address, not from the user agent. The string only describes the browser, engine, operating system and sometimes the device model.

Can I change my user agent?

You can. Developer tools and extensions can override the string, which testers use to preview how sites treat other browsers. The change lasts only while the override is active and the browser may behave oddly on sites that rely on it.

Why do two browsers on my computer show different strings?

Each browser builds its own string with its own name, engine and version, and updates can change it. That is exactly why support teams ask you to copy it rather than describe your setup from memory.

User Agent Finder: A Quick Recap

The User Agent Finder gives you the exact identity line your browser presents to every website, with a one-click copy for the moments someone needs it. It takes seconds to check and removes all guesswork from support conversations and cross-browser testing.