Yauaa: Yet Another UserAgent Analyzer

This is a java library that tries to parse and analyze the useragent string (and when available the User-Agent Client Hints) and extract as many relevant attributes as possible.

Works with Java, Scala, Kotlin and provides ready for use UDFs for several processing systems.

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

Try it!

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

NOTES

1. This runs on a very slow and rate limited machine.
2. If you really like this then run it on your local systems. It’s much faster that way. A Kubernetes ready Docker image is provided. See this page about the WebServlet for more information.

Donations

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

License

Yet Another UserAgent Analyzer
Copyright (C) 2013-2025 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.