Getting a bootloader and CircuitPython onto an Espressif board can be a complicated process, involving multiple downloads and software tools. But there's an easier way. The Espressif boards on the board download pages on circuitpython.org provide a button labelled OPEN INSTALLER. Clicking this button invokes the Web Firmware Installer. This easy-to-use step-by-step tool can:

• Erase the flash on a board
• Install the TinyUF2 bootloader (if the board supports it)
• Install CircuitPython
• Fill in settings.toml with your desired network settings

This Learn Guide describes how to the use the tool. Go to the page that describes which board you have:

• Boards with Full USB Support: Espressif ESP32-S2, ESP32-S3
• Serial-Only Boards: Espressif ESP32, ESP32-C2, ESP32-C3, ESP32-C6, ESP32-H2