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SPCXTools

What Is My User Agent

See your user agent string and what it says about your browser, system and device — or decode any other one.

Runs locally — files never leave your device

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How to use What Is My User Agent

  1. 1Open the page — your own user agent is shown and decoded automatically.
  2. 2Read the browser, version, operating system, device type, model and rendering engine.
  3. 3To analyse another user agent, for example from a server log, paste it into the box.
  4. 4Copy the user agent if a support team or developer asks for it.

Check your browser's user agent

Support teams, developers and website forms sometimes ask "which browser and version are you using?" This page answers instantly. It shows your user agent string — the identification your browser sends to every website — and decodes it into plain language: browser and version, operating system, whether you're on a desktop, phone or tablet, the device model if it's known and the rendering engine. You can also paste any user agent, for example from a server log or analytics report, to see what it means.

Features

  • Your user agent shown and decoded automatically.
  • Parse any user agent by pasting it.
  • Browser, OS, device type, model and engine detection.
  • Extra browser details: languages, screen and window size, CPU cores, memory, touch support and time zone.
  • One-click copy for support requests.
  • Private: decoded in your browser, never logged.

Example user agents

Device User agent (shortened)
Chrome on Windows Mozilla/5.0 (Windows NT 10.0; Win64; x64) … Chrome/129.0.0.0 Safari/537.36
Safari on iPhone Mozilla/5.0 (iPhone; CPU iPhone OS 18_0 like Mac OS X) … Version/18.0 Mobile/15E148 Safari/604.1
Firefox on Linux Mozilla/5.0 (X11; Linux x86_64; rv:131.0) Gecko/20100101 Firefox/131.0
Googlebot Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

Related tools

Find your public IP address and approximate location with What Is My IP, check your display with Screen Resolution, or look up a domain's records with DNS Lookup.

Frequently asked questions

What is a user agent?
A user agent string is a line of text your browser sends with every request to a website. It names the browser, its version, the operating system and sometimes the device, so sites can deliver compatible pages and gather statistics.
Why does my user agent mention Mozilla, Safari and Chrome at the same time?
For historical compatibility. Websites once served better pages only to certain browsers, so newer browsers copied parts of older browsers' strings. Almost every browser now starts with "Mozilla/5.0", and Chrome-based browsers also mention Safari and AppleWebKit.
Why is my operating system version not exact?
To protect privacy, modern browsers freeze or reduce some details. Chrome reports Windows 10 as "Windows NT 10.0" even on Windows 11, and macOS versions are often reported as 10_15_7. The parser shows what the string says, which may be less precise than your real version.
Can a user agent be faked?
Yes. Browsers, extensions and scripts can send any user agent, and developer tools let you change it to test sites. A user agent is a hint, not proof of the real device.
Is any of this information sent to your server?
No. Your user agent and device details are read and decoded in your browser and not stored or logged by this tool.

Related tools

What Is My IP Address?Your public IP address, approximate location and internet provider — shown instantly.Screen ResolutionSee your screen resolution, browser viewport size, pixel ratio and other display details instantly.DNS LookupCheck the DNS records of any domain, or find the hostname behind an IP address.