Browser DevTools Companion Extension
Embed an official Playground API panel directly inside Chrome, Edge, Brave, and Arc Developer Tools (F12). Throttling, error simulation, RBAC role switches, and 1-click sandbox resets without writing a single line of header code.
Get the Extension
Download the store-ready Manifest V3 extension bundle to load unpacked in 5 seconds.
Install directly from the official Chrome Web Store with automatic background updates.
Available for Microsoft Edge with native enterprise policy integration.
5-Second "Load Unpacked" Installation Guide
Click the Download Extension (.zip) button above and extract the contents to a folder on your computer.
In Chrome, navigate to chrome://extensions (or edge://extensions in Edge, brave://extensions in Brave).
Toggle on Developer mode in the top-right corner, click Load unpacked, and select the extracted extension folder.
Open DevTools (F12 or Right Click → Inspect) on any web app and click the "Playground API" panel tab.