What Is My Browser
Detect your browser, OS, and device from your User-Agent string.
Detect your browser, OS, and device from your User-Agent string.
This free What Is My Browser from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.
How to use the What Is My Browser
- Enter the URL you want to audit.
- Run the scan - the tool fetches the page and parses scripts.
- Review which trackers are present, missing or duplicate.
- Fix issues in your GTM container or page template.
What you can do with the What Is My Browser
- Verify tracking after a deploy or migration.
- Audit competitor sites for the tools they use.
- Catch duplicate GA tags that inflate metrics.
- Pre-launch QA before pushing a new property live.
Why use KX Toolkit's What Is My Browser
- Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
- Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
- Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
- Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
- One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.
Tips for the best results
Test in an incognito window with ad-blockers OFF - extensions can mask trackers and produce false negatives.
Related Website Tracking
If you find this tool useful, explore the full Website Tracking collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.
How does this tool know my browser and OS?
The tool reads the User-Agent header and a handful of JavaScript properties your browser exposes, then matches them against a database of known signatures. From those signals it infers the browser name, version, rendering engine, operating system, and device family. Everything happens by inspecting what your browser already advertises to every website you visit, with no scanning of your machine and no installed software required.
Why do my detected details sometimes look out of date?
Modern browsers, especially Chrome and Edge, intentionally freeze or simplify the User-Agent to reduce fingerprinting. You may run the latest version yet see only the major version reported. Operating system detail has likewise been reduced to broad categories. The tool reflects what the browser shares, so out-of-date-looking output is usually privacy hardening rather than a flaw in detection logic.
Can the tool tell if my browser is up to date?
Sometimes. By comparing the detected version against a known list of latest releases, the tool can flag clearly outdated browsers that miss security patches. However, enterprise users on managed channels and niche forks may legitimately run older numbers. The safest approach is to check inside the browser's About dialog, which queries the vendor directly and triggers updates if any are available.
Is the detected information stored anywhere?
No. The detection runs in your browser using values it already produces, and the page does not transmit them to a server for storage. You can view the same data with developer tools at any time. This makes the tool safe to share with non-technical users who need to send their environment details to support teams, since no account, login, or tracking pixel is involved.
Why does an incognito or private window sometimes hide details?
Private modes typically do not change the User-Agent, but they disable extensions and reset some preferences, which can affect the JavaScript signals the tool uses. Hardened privacy browsers like Brave or Tor go further and strip or randomise identifying values intentionally. If results look minimal or generic, anti-fingerprinting protection is likely active, and that is a feature rather than a bug.
Will spoofing my User-Agent make this tool wrong?
Yes. Extensions and developer-tools settings can rewrite the User-Agent to any value, and the detector will report whatever was sent. Spoofing is useful for testing how a site renders to mobile crawlers or older browsers, but remember to disable it before browsing normally, otherwise sites may serve incorrect layouts or block you entirely. The tool itself has no way to detect spoofing reliably.
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