arduino-esp32/docs/arduino-ide/boards_manager.md

Installation instructions using Arduino IDE Boards Manager
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Starting with 1.6.4, Arduino allows installation of third-party platform packages using Boards Manager. We have packages available for Windows, Mac OS, and Linux (32 and 64 bit).

- Install the current upstream Arduino IDE at the 1.8 level or later. The current version is at the [Arduino website](http://www.arduino.cc/en/main/software).
- Start Arduino and open Preferences window.
- Enter `https://espressif.github.io/arduino-esp32/package_esp32_index.json` or `https://espressif.github.io/arduino-esp32/package_esp32_dev_index.json` into *Additional Board Manager URLs* field. You can add multiple URLs, separating them with commas.
- Open Boards Manager from Tools > Board menu and install *esp32* platform (and don't forget to select your ESP32 board from Tools > Board menu after installation).

Stable release link: `https://espressif.github.io/arduino-esp32/package_esp32_index.json`

Development release link: `https://espressif.github.io/arduino-esp32/package_esp32_dev_index.json`