User Agent Parser

Full User Agent analysis: client, device, operating system and crawler detection

Raw User Agent

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)

Request IP Address:

Detected Information

Type browser
Name Internet Explorer
Version 6.0
Engine Trident
Engine Version unknown
Type desktop
Brand unknown
Model unknown
Operating System
Name Windows
Platform unknown
Version XP



If you want to check out the API we provide, try out the following code:

$ curl
{"data":{"user_agent":"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)","details":{"os": {...}, "device": {...}, "client": {...}}}}

Our API provides an easy way to retrieve the user agent information of a given User-Agent header and use it in your programs.


Using our API is extremely simple. Make a HTTP GET request and fetch the results in JSON or JSONP format. For JSONP format, add ?callback="something" in the request URL.

Our commitments

  • You can use this API for free but there is a sensible rate-limiting in place, see below.
  • The service is deployed on highly available clusters of major cloud providers (AWS, GCP, etc.) which means it should always be up, no matter what.
  • This API is here to stay ! My own software depends on these services so I'll keep them running and improving for the years to come.
  • I'm a bit obsessed with quality and performance. If you see anything strange or slow, contact me.


The requests are throttled at 1 per second which should be plenty for most use cases. If you hit the speed limit the service will return a 429 http status code.

If you need more, you can get unlimited access for a small contribution by reaching out to me at and we'll sort things out depending on your situation and use-case.


Free online tools focused on reliability and speed.
For developers, we offer free public REST APIs: IP to geolocation, hostname information, user-agent string parser, identicon generator and more

My User Agent

Find out what's your User Agent

User Agent information

Analyze a User Agent header