User Agent Parser

Detect browser, device, and OS from any user agent string.

Parse a user agent string

Insert a raw UA from logs or detect your current browser to understand how platforms see you.

What is a User Agent?

A user agent string identifies the browser, OS, device, and rendering engine. Parsers help developers and marketers troubleshoot compatibility.

What does this tool do?

The parser breaks down user agent strings to reveal the browser, operating system, device type, and rendering engine for faster troubleshooting.

Why parse a User Agent?

Browser detection

Identify Chrome, Safari, Firefox, Edge and other browsers.

Device detection

Detect whether the request comes from desktop, mobile, or tablet.

OS detection

Understand which operating system the user is running.

FAQ

User-Agent Parser FAQ

Understand browsers and devices.

What can the parser detect?

It identifies the browser family, operating system, device type, and rendering engine.

How accurate are device labels?

The parser uses an up-to-date user-agent database to categorize desktop, mobile, or tablet devices.

Can I paste multiple user agents?

Process them one at a time to keep results readable and avoid confusion.

Do you store the strings?

No, user-agent strings are processed in memory and never logged.

Sample parsed UA

Paste the raw user agent and capture the parsed fields for your ticket:

Mozilla/5.0 (iPhone; CPU iPhone OS 16_4 like Mac OS X)
Browser: Mobile Safari 16.4
OS: iOS 16.4
Device: iPhone

Understand every user agent string

Turn long UA strings into readable browser, OS, device, and engine labels.

  • Paste raw UA strings from logs or analytics.
  • Detect when proxies or bots spoof mobile vs. desktop.
  • Share parsed results with QA teams or partners.

When to use

  • •

    Diagnosing device-specific landing issues.

  • •

    Auditing anti-bot filters or cloakers.

  • •

    Explaining analytics anomalies to stakeholders.

Practical examples

Debug bot traffic

Paste suspicious UAs from logs to see if traffic truly came from Chrome on Android.

Verify creative approvals

Show reviewers which devices you tested by sharing parsed UA outputs.

Support multi-device QA

Record the UA string whenever you reproduce a bug so engineers can replicate it.

Contextual resources

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