Web Flasher Is Now Live — Flash Meshtastic Firmware from Your Browser

We’re excited to announce that our Web Flasher tools are now live at mtoolstec.com/flasher and meshtiny.com/flasher — flash Meshtastic firmware directly from your browser, no software installation required.

What Is the Web Flasher?

The Web Flasher is a browser-based firmware update tool built on the Web Serial API. It lets you connect your device via USB and flash the latest Meshtastic firmware with just a few clicks — right from Chrome or Edge. No drivers, no command line, no desktop app needed.

Two Flasher Tools, One Workflow

We maintain two separate flasher instances tailored to each product line:

mtoolstec.com/flasher — supports nRF52840 and ESP32 devices, including the GAT562 Tracker and the ESP32 UART Bridge expansion board.
meshtiny.com/flasher — dedicated to Meshtiny nRF52840 devices running Meshtastic firmware.

Supported Devices & Chipsets

Both flashers currently support:

nRF52840 — flashed via Nordic HCI DFU over USB CDC ACM (1200bps serial reset to enter bootloader)
ESP32 (MTools Tec flasher only) — flashed via esptool-js over Web Serial

How to Flash in 3 Steps

Select your firmware — choose your device and firmware version from the dropdown. The flasher fetches the latest available builds automatically.
Enter DFU mode — click the Enter DFU Mode button to reboot your device into its bootloader, or double-tap the reset button manually.
Connect & Flash — click Connect USB Serial, select your device from the browser port picker, then hit Flash Firmware.

Key Features

✅ No install required — works entirely in-browser (Chrome / Edge)
✅ SHA256 checksum — firmware integrity is verified before flashing
✅ Optional erase — collapsible erase option for resolving old partition issues
✅ Serial Monitor — built-in live serial output viewer (MTools Tec flasher)
✅ English / 中文 — full bilingual support
✅ Always up to date — firmware list is fetched live, so you always see the latest version