esptool A Python-based, open-source, platform-independent serial utility for flashing, provisioning, and interacting with Espressif SoCs.

In this major release, esptool was refactored, and some breaking changes were introduced. See the v5 Migration Guide article in the documentation for a detailed list of changes and guidance on adapting …

Aug 13, 2025 · Built on the Web Serial API, esptool-js runs directly in Google Chrome or Microsoft Edge, making it possible to work on almost any operating system without drivers or Python dependencies. …

Adafruit WebSerial ESPTool Web tool to install firmware on ESP devices via the browser using WebSerial.

ESPTool is a native C# implementation of Espressif's ESP tool (esptool). This library was created to enable direct interaction with ESP devices (such as ESP32) without relying on external applications.

Jun 16, 2021 · This repository contains a Javascript implementation of esptool, a serial flasher utility for Espressif chips. esptool-js is based on Web Serial API and works in Google Chrome and Microsoft …

May 28, 2025 · Javascript implementation of flasher tool for Espressif chips, running in web browser using WebSerial. - Releases · espressif/esptool-js

Nov 25, 2021 · Serial utility for flashing, provisioning, and interacting with Espressif SoCs - Home · espressif/esptool Wiki

esptool.py was started by Fredrik Ahlberg (@ themadinventor) as an unofficial community project. It is now also supported by Espressif. Current primary maintainer is Angus Gratton (@ projectgus). …

Jan 27, 2026 · Since esptool works via the command line but the GUI tool does not, the most common cause is a configuration mismatch in the Flash Download Tool interface: Chip Type: Ensure you …