What is my browser?

Your screen resolution, window size, browser and version, operating system and user agent appear in the tool above. They’re read from this device and never leave the page. Support teams ask for them because many bugs only happen in one browser version or below one window width, and Copy for support hands them over in one paste.

What is my screen resolution?

Your screen resolution, as a website sees it, is the width and height of your display in CSS pixels. On a high-density screen that’s smaller than the panel’s real pixel count. A laptop with a 2880 by 1800 panel at 2x scaling reports 1440 by 900, and a 1920 by 1080 monitor with Windows set to 150% reports 1280 by 720.

Three numbers get mixed up here, and support teams usually need all of them.

Multiply the screen resolution by the pixel ratio and you get the physical resolution, which the tool shows as physical pixels. The window size, which the tool updates as you resize, is the one that matters most for layout bugs, because a page that breaks at 1100 pixels wide will break on any screen if the window is that narrow. Browser zoom changes some of these numbers too. The tool shows the zoom level when it can tell and warns you when the page isn’t at 100%, so reset it with Ctrl+0 (Cmd+0 on a Mac) before you copy them.

What is my user agent?

Your user agent is the line of text your browser sends to every website to say which browser, version and operating system it is. The tool shows yours exactly as sites receive it. Don’t expect it to be precise, though. Chrome and Edge now freeze parts of it, so it can claim an older operating system than the one you’re running.

That’s why the tool asks Chrome, Edge and other Chromium browsers directly, through a feature called Client Hints, for their full version and operating system. That’s also how it tells Windows 11 from Windows 10. Firefox and Safari don’t answer those questions, so there the tool reads the user agent, shows “Windows 10 or 11” on Windows and shows macOS without a version on a Mac, because every Mac browser reports the same old one.

Our guide to what a user agent is breaks a real string into its parts and explains why it says “Mozilla” whatever browser you use.

What browser am I using?

The tool names your browser and its version above. If you want to check by hand, every browser has an About page that shows its name and full version:

Browsers built on Chrome usually tell the tool their real name, so Edge, Opera and Brave show up as themselves. A few, like Vivaldi, present themselves as Chrome on purpose. If the tool calls your browser Chrome and you know it isn’t, tell support the real name.

What version of Chrome do I have?

To see your exact Chrome version, click the three dots at the top right, then Help, then About Google Chrome. The version is the long number under the heading, such as 155.0.8059.82. The first number is the major version, and that page also tells you whether an update is waiting.

The tool above shows the same full version in Chrome, Edge and other Chromium browsers, because it asks the browser instead of reading the user agent. Since 2022 Chrome’s user agent only shows the major version followed by zeros, like Chrome/155.0.0.0, so a user agent alone can’t tell anyone which build you’re on. It also tells you when your browser is two or more versions behind the current release. The About page is still worth a visit, because it installs any pending update, and a restart afterwards fixes a surprising number of bugs before anyone has to look at them.

What “Copy for support” sends

Copy for support puts the details from this page on your clipboard as plain text, one per line, ready to paste into an email, chat or ticket:

• Browser, with its full version, and a note if it’s out of date
• Operating system
• Device (computer, tablet or phone), and whether it has a touch screen
• Screen resolution, pixel ratio and physical pixels
• Window size
• Zoom, when the tool can tell
• Color scheme, light or dark
• Whether cookies and local storage work, and that JavaScript is on
• Whether an ad blocker was detected
• Privacy signals: Do Not Track and Global Privacy Control
• Connection speed, in Chrome, Edge and other Chromium browsers, the only ones that report it
• Time zone, with its offset from UTC
• Languages, in your browser’s order of preference
• Your user agent, in full

The tool shows the exact text under “What Copy for support sends” before you copy it. Everything is read in your browser, and none of it leaves the page. Nothing is sent anywhere until you paste it or share the link yourself.

Copy link makes a link with the same details in it, for when a link is easier to send than a block of text. The details sit after the # in the link, the part browsers never send to a server, and the page takes them out of the address bar as soon as it opens. Whoever opens the link sees your details, marked as shared, and can switch to their own with Show mine.

Support asks for these because a large share of web bugs depend on them. A layout problem might only appear below a certain window width. A blurry image is often a pixel ratio issue, a broken feature can be a bug in one browser version that’s already fixed in the next, a date that’s a day off is usually a time zone, a page that won’t keep you signed in is often blocked cookies, and an ad blocker can hide a button or stop a checkout. Without these details the first few messages of a support thread are spent collecting them. Website feedback tools like Snags attach the browser, device and screen size to every comment automatically, and when you’re writing to support by email, this page is the manual version of that.

For support teams

Send the link rather than a list of instructions. Asking a customer to find their pixel ratio is a dead end, while “open this page and paste what it copies” takes them ten seconds and gets you the same answer every time.