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About the User Agent Parser

The Zadein User Agent Parser decodes a browser user agent string into its components — browser name and version, operating system, and device type. It is useful for understanding what client information is being sent to a server.

How to use

  1. 1Paste a user agent string into the input field, or use the auto-detected string from your browser.
  2. 2The tool parses and displays the browser, OS, and device details.
  3. 3Review the parsed components.

Common use cases

  • Analyse user agent strings from server logs to understand visitor browsers.
  • Verify what user agent your browser is sending to websites.
  • Debug issues related to browser detection in a web application.
  • Inspect user agent strings from automated tools or bots.

Frequently asked questions

Can user agent strings be spoofed?

Yes. User agent strings are sent by the client and can be modified. They should not be relied on for security decisions.

What information is extracted from the user agent?

Browser name and version, operating system and version, and device type (desktop, mobile, tablet) are extracted.

Does it recognise bot and crawler user agents?

Common bots and crawlers are recognised. Unknown or custom user agents may not be fully parsed.