If you have ever wondered "what is my browser" while filing a support ticket or troubleshooting a website that will not load correctly, this page answers it in plain language. The moment you arrive, DeftGauge reads the information your browser already shares and lays it out for you: the browser name, the exact version number, your operating system, the type of device you are using, the full user agent string, and your screen and viewport dimensions. There is nothing to install and nothing to configure. The tool auto-detects everything the instant the page loads.
Knowing what is my browser version matters more than most people realize. Web features, security patches, and visual layouts change from one release to the next, so a problem you are seeing might simply be an out-of-date build. By reading the version number off this page, you can confirm whether you are running the latest release or whether an update is overdue. It is the fastest way to rule out version-specific bugs before you spend time chasing other causes.
Your browser version & user agent explained
Every request your browser sends to a website carries a line of text called the user agent. If you have searched for what is my browser user agent, this is the string you want. It packs together the browser brand, the rendering engine, the version, and the operating system into a single identifier that servers use to make compatibility decisions. The user agent can look cryptic because of historical quirks, but it is genuinely useful: paste it into a bug report and a developer can reproduce your exact environment without a long back-and-forth.
- Browser name and version, so you know precisely what you are running.
- The raw user agent string, ready to copy for support tickets.
- Operating system and device type for full context.
- Screen and viewport size, useful when a layout looks wrong.
- Capabilities such as language, time zone, and CPU cores.
What is my browser on this phone vs my computer
The answer to what is my browser on this phone is often different from what is my browser on my computer, even when both feel familiar. Mobile builds, tablet builds, and desktop builds report distinct user agents and device hints, and the tool detects which one you are on automatically. That distinction is important because a site might behave perfectly on a laptop yet break on a handset, or render at a cramped width on a small screen. Checking each device separately gives you the complete picture.
This is also where the size details earn their keep. If you have looked up what is my browser size, the page shows both your physical screen resolution and your current viewport, which is the actual area your page has to draw in. Responsive layouts react to the viewport, so a mismatch there frequently explains why columns wrap oddly or text overflows on one device but not another.
Why this matters
Most people reach for a tool like this for a practical reason. Support teams ask for your browser and version before they can help. Developers need your user agent to reproduce a bug. Sometimes you simply want to verify that a recent update actually took effect, or to compare two machines that are behaving differently. Whatever the case, having every relevant detail on one screen turns a frustrating guessing game into a quick, confident answer. When you are ready, copy the full report and attach it to your message so the person helping you has exactly what they need from the start.