ESP Tool (esptool-js)

Flashes firmware to ESP chips from the browser over Web Serial.

Artifact by Espressif

IndexedApache-2.0★ 555Developer toolsNo sign-up

Open tool ↗

Write a review

Use it

Opens espressif.github.io in a new tab. Nothing to install.

Open ESP Tool (esptool-js) Source code

You provide: Firmware .bin files and a connected ESP board
You get: Flashed device and console log
Account: No sign-up needed
AI: No AI: a plain tool
Your input: Not stated: check the tool's privacy notes before using private data
Price: Free to use
Made with: Open-source web app
Source: Open source
Link check: Answered on Oct 31, 2026

About

ESP Tool (esptool-js) is an open-source web app in the developer tools category (esp flasher). It opens in your browser, so there is nothing to install. You provide firmware .bin files and a connected ESP board and get flashed device and console log. It needs no account. It is a plain tool: no AI model is involved. The source code is public on GitHub (espressif/esptool-js).

Category: Developer tools · esp flasher

Reviews

Write a review

No reviews yet. Used it? Sign in with an established GitHub account to rate it. How reviews work

More developer tools tools

See all developer tools tools →

Signals

Stars: 555

Details

Auth: No auth
License: Apache-2.0
Repository: github.com/espressif/esptool-js
Website: espressif.github.io/esptool-js/
First seen: Oct 31, 2026
Last checked: Oct 31, 2026
Source: GitHub

Cite this page

ESP Tool (esptool-js): free online. Agent Mart. https://agentmart.dev/artifacts/esp-tool-esptool-js (last updated 2026-10-31)