This is a java library that tries to parse and analyze the useragent string and extract as many relevant attributes as possible.

The full documentation can be found here https://yauaa.basjes.nl

• Fully replaced SLF4J with Log4J2; since this is a breaking change the next version will be 6.0
• Dropping the native commandline version. Using the webservlet locally with curl is a lot faster.

A bit more background about this useragent parser can be found in this blog which I wrote about it: https://techlab.bol.com/making-sense-user-agent-string/

As an example the useragent of my phone:

Mozilla/5.0 (Linux; Android 7.0; Nexus 6 Build/NBD90Z) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.124 Mobile Safari/537.36

is converted into this set of fields:

You can try it online with your own browser here: https://try.yauaa.basjes.nl/.

NOTES

1. This runs under a "Free quota" on Google AppEngine. If this quota is exceeded then it will simply become unavailable for that day.

2. After a while of inactivity the instance is terminated so the first page may take 15-30 seconds to load.

3. If you really like this then run it on your local systems. It's much faster that way. A ready to run docker image that can be used in both local mode and also in Kubernetes: (more info).

   With docker installed do

   docker pull nielsbasjes/yauaa
   docker run -p8080:8080 nielsbasjes/yauaa
   

   and then open

   http://localhost:8080/
   

Stefano Balzarotti is putting a lot of effort into porting Yauaa to run in .NET standard.

You can track his efforts here on Github: Yauaa .NET standard and download his releases via Nuget.

If this project has business value for you then don't hesitate to support me with a small donation.

Yet Another UserAgent Analyzer
Copyright (C) 2013-2021 Niels Basjes

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.