The **wdio‑json‑reporter** is a WebdriverIO plugin that outputs test run results as JSON files (or to STDOUT). It supports multiple WDIO versions (v4‑v7), lets you configure output directories, custom filenames, and provides a helper to merge parallel‑session JSON reports into a single file—making it useful for developers and QA engineers who need machine‑readable test results for further processing or reporting.