Starting a development for embedded IoT system can be a tedious task, starting with the tools and SDK installations. You also need to have proper operating system, cables and environment variables set up correctly in order to do anything. This can take hours if not days. In this talk, we present an alternative, fast and easy way to start IoT development. All you need is your Zephyr board, USB cable and Web Browser. The Zephyr will be running JavaScript Runtime for Zephyr including a “shell” developer mode and Web USB. The Browser has the IDE where you can edit and download code to your board. No compiling, flashing or rebooting is required. During the talk, we will also do live application development and deployment from the Browser to IoT boards running Zephyr.