What Is My Browser
See your browser name, version and system details instantly
What the What Is My Browser Tool Does
When a website misbehaves, support teams almost always ask the same first question: which browser are you using? Many people do not know the answer, especially on phones, where the browser may be built into an app. The What Is My Browser tool on WebTOOLkt tells you. Open the page and it detects the browser name and version, the operating system and other details your browser shares with every website you visit.
There is nothing to type or install. The result appears as soon as the page loads, ready to copy into a support request or a bug report.
How to Use the Tool
- Open the What Is My Browser page in the browser you want to check.
- Read the detected browser name and version number.
- Note the operating system and device type if shown.
- Copy the details and paste them into your message to a support team or developer.
- Repeat in another browser or device if you want to compare them.
Always test in the browser that has the problem. Checking in a different one gives you a different answer.
How a Website Knows Your Browser
Every request your browser makes includes a short text identifier called the user agent. It states roughly who is asking: browser, version and platform. Websites, analytics tools and servers read it to adapt pages or count visitors. Mozilla explains the header in its User-Agent reference. The What Is My User Agent tool on WebTOOLkt shows the full string if you want to see it exactly as sent.
Detection is not perfect. Browsers imitate each other for compatibility reasons, and some privacy settings or extensions change what is reported. Modern browsers also reduce the detail in the string to limit tracking, and offer a newer system called client hints for sites that genuinely need more information, described in the MDN guide to client hints.
Why Your Browser Version Matters
- Security. Updates fix vulnerabilities that attackers exploit. An old browser is an easy target.
- Compatibility. Newer websites use modern features that older browsers cannot run. You may see missing buttons, broken layouts or errors.
- Performance. Updates often improve speed and reduce memory use.
- Support. Web services usually test only recent versions, so help desks may ask you to update first.
Most browsers update themselves, but a pending restart can leave you on an old version for weeks. If the tool shows a version well behind the latest release, open your browser's About page and check for updates.
Common Uses
- Support requests. Give a clear description of your setup so problems are solved faster.
- Web development. Confirm which browser and version you are testing in.
- Checking a work or school device. Learn what is installed when you are not sure.
- Verifying privacy settings. See what a website can read about your browser before you adjust settings or install an extension.
- Learning. Understand how the web identifies browsers and devices.
Related Details Worth Checking
Browser details are only part of the story when a page does not work. Screen size, language, cookies and extensions can matter as much. The What Is My Screen Resolution tool shows your display size, the Screen Resolution Simulator previews a page at other sizes and the What Is My IP tool shows the address websites see. Collecting these together gives developers everything they need.
If you build websites, avoid relying only on browser detection. Mozilla recommends feature detection over sniffing the user agent, as explained in its browser detection guide.
Why Use This Tool Instead of Other Options
Digging through menus to find a version number differs on every browser and device. The What Is My Browser tool gives you the answer in a single step, free and without installing anything. It sits with other diagnostic tools on WebTOOLkt so you can gather all the information a support request needs from one website.
Related WebTOOLkt Tools
- What Is My User Agent to see the full user agent string.
- What Is My Screen Resolution to check your display size.
- Screen Resolution Simulator to preview a page at other sizes.
- What Is My IP to see your public IP address.
- IP Address Lookup to learn about an IP address.
- Get HTTP Headers to read headers a server sends.
Useful External Resources
Frequently Asked Questions
Why does the tool show a different browser than I expected?
Some browsers share an engine and report similar details, and extensions or settings can change what is reported.
Is it safe to share my browser details?
Yes. They are sent to every website you visit and are not personal information on their own.
How do I update my browser?
Open the browser's About or Help menu and check for updates, then restart it.
