Uier (UI[test]er) is a tool that provides codeless or low-code User Experience test editing and management. Uier uses Selenium to perform testing or UI automation. When running a script, results are fed back to the user interface to visually inspect failures. Each step captures screenshots and the full browser state.

Uier tends to be a free self hostable alternative to Applitools, Endtest, Ghost Inspector, Usetrace, Screenster and many others. In addition to testing, Uier can also be used for general automation purposes.

To facility testing, Uier implements the Selenium browser automation API. The goal of Uier is to become feature compatible with Selenium IDE by implementing all of its commands.

For each test, parameters can be specified such as the starting URL domain and which browser to use. Define the commands that follow the scenario desired to test. Once the test is saved, it can be ran and the results will be output and can be observed for each step.

In addition to running single tests, tests can also be combined in a collection. With a collection, the default parameters can be overwritten. This allows a test to not only run against it's predefine URL domain or browser, but against any desired combination. This is a useful feature to facilitate running the same test against a development environment, a user acceptence environment, a build server, etc.

All communication between the Uier front end and the database is routed through a REST API. This REST API is also available for end users to automate common or scheduled events, such as running a test or adding users.