What Is My Browser
See your browser, operating system, screen size, viewport, language, time zone and device capabilities.
About What Is My Browser
This tool shows what browser you are using and its version, along with your operating system, full user agent string, screen resolution, browser window (viewport) size, device pixel ratio, language, time zone and device capabilities. Details are detected instantly when you open the page.
Resize the window and the viewport size updates live, which helps web designers test responsive layouts. Copy the full report to share with a support team or developer when reporting a problem. The information is read in your browser and nothing is sent anywhere. It is free and needs no sign-up.
How to use What Is My Browser
- Open the tool — details are detected instantly.
- Resize the window to see the viewport update live.
- Copy the report to share with support or a developer.
Frequently asked questions
Is this information sent anywhere?
No. Everything is read from your browser locally and shown only to you.
Why does my phone show a smaller viewport than its resolution?
Phones use a device pixel ratio (often 2–3). A 1080-pixel-wide screen with ratio 3 has a 360 CSS-pixel viewport, which is what websites design for.
Why is my version shown as 10.15 on a newer Mac?
Browsers freeze the macOS version in the user agent for privacy, so the exact version cannot be read reliably.
How do I find my browser version?
Open this page and your browser name and version are shown at the top, along with your operating system.
What is a user agent?
It is a line of text your browser sends to websites identifying the browser, version and operating system.
What is the difference between screen resolution and viewport size?
Screen resolution is the size of your whole display. Viewport size is the visible area of the browser window where pages are drawn.
People also search for
what is my browser · what is my browser version · what is my browser size · what is my browser user agent · what is my browser resolution · what is my browser timezone · user agent · user agent online · my browser · screen resolutions