Can I trust the user-agent string?

No — any client can send any string, and some browsers deliberately freeze or spoof parts of it. Treat parsed UA data as a hint for statistics and routing, never as an authentication factor.

Why does the device field say "generic" on desktop?

Desktop browsers do not report a device model at all, so the parser can only say the class. Detailed device names appear mostly for mobile UAs.

How do I recognise a bot?

Bots usually announce themselves (Googlebot, bingbot) and often lack a full engine/version structure. Parse the string and check whether browser and engine fields look coherent — missing pieces are a strong bot signal.

User-agent parser — Guide

Detect and parse Browser, Engine, OS, CPU, and Device type/model from an user-agent string.

What it is and when to use it

Paste a user-agent string and get its structure parsed into browser, engine, OS, CPU and device fields. Essential when triaging analytics, writing UA-based routing rules, or checking what a crawler's UA actually declares before you trust it.

Identifies the browser, engine, operating system and device type from a User-Agent string.

How to use it

Paste a UA string, or fill in the current browser in one click
Read the parsed information
Copy the fields you need

A worked example

Fill in a sample UA

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Copy this into the tool, or open User-agent parser

Things that trip people up

A UA string can be forged, so it suits statistics and display but never security decisions

Questions people ask

Can I trust the user-agent string?: No — any client can send any string, and some browsers deliberately freeze or spoof parts of it. Treat parsed UA data as a hint for statistics and routing, never as an authentication factor.
Why does the device field say "generic" on desktop?: Desktop browsers do not report a device model at all, so the parser can only say the class. Detailed device names appear mostly for mobile UAs.
How do I recognise a bot?: Bots usually announce themselves (Googlebot, bingbot) and often lack a full engine/version structure. Parse the string and check whether browser and engine fields look coherent — missing pieces are a strong bot signal.

Next steps

Open the User-agent parser tool

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