# balenaEtcher — Cross-Platform OS Image Flasher

> balenaEtcher is an open-source tool for flashing OS images to SD cards and USB drives safely and easily. It runs on Windows, macOS, and Linux with a simple three-step workflow.

## Install

Save as a script file and run:

# balenaEtcher — Cross-Platform OS Image Flasher

## Quick Use
```bash
# Install on macOS
brew install --cask balenaetcher

# Install on Linux (AppImage)
wget https://github.com/balena-io/etcher/releases/latest/download/balenaEtcher-linux-x64.AppImage
chmod +x balenaEtcher-linux-x64.AppImage
./balenaEtcher-linux-x64.AppImage

# Usage: Select image -> Select drive -> Flash
```

## Introduction
balenaEtcher is a cross-platform desktop application that writes OS images to SD cards and USB drives. Built by the balena team, it provides a minimal three-step interface — select image, select target, flash — that eliminates the risk of accidentally overwriting the wrong drive. It is widely used for flashing Raspberry Pi images, Linux live USBs, and embedded device firmware.

## What balenaEtcher Does
- Writes IMG, ISO, ZIP, and other compressed image formats to removable drives
- Validates the written image after flashing to catch silent write errors
- Supports flashing to multiple drives simultaneously for batch provisioning
- Prevents accidental selection of system drives with built-in drive protection
- Provides a progress bar with estimated time remaining during writes

## Architecture Overview
balenaEtcher is built with Electron for the desktop UI and uses native Node.js modules for low-level disk access. The flashing engine (etcher-sdk) handles image decompression, block-level writing, and post-write validation in a streaming pipeline. Drive detection relies on OS-specific APIs wrapped through the drivelist module. The application requests elevated privileges only for the actual write operation, keeping the UI running as a regular user process.

## Self-Hosting & Configuration
- Download installers or portable builds from GitHub Releases for Windows, macOS, and Linux
- Available as AppImage, DEB, and RPM packages for Linux distributions
- Install via Homebrew Cask on macOS or Chocolatey on Windows
- No configuration files needed — the application is ready to use after installation
- CLI mode available via balena-cli for headless or scripted flashing workflows

## Key Features
- Three-step UI makes flashing accessible to beginners with no command-line knowledge
- Post-write validation ensures the image was written correctly before ejecting
- Hard drive filter prevents accidental overwrites of internal system disks
- Multi-write mode flashes the same image to several drives at once
- Supports URL-based image sources for direct download-and-flash workflows

## Comparison with Similar Tools
- **Rufus** — Windows-only with more advanced partition and boot options; balenaEtcher is cross-platform with a simpler interface
- **dd** — the classic Unix command-line tool; powerful but easy to misuse without drive protection
- **Raspberry Pi Imager** — tailored for Raspberry Pi OS images with Wi-Fi pre-configuration; balenaEtcher works with any image
- **Ventoy** — creates multi-boot USB drives from multiple ISOs; balenaEtcher writes a single image per drive

## FAQ
**Q: Does balenaEtcher verify the flash was successful?**
A: Yes. After writing, it reads back the drive contents and compares them to the source image to detect errors.

**Q: Can balenaEtcher flash ISO files for Linux distros?**
A: Yes. It handles ISO, IMG, ZIP, GZ, BZ2, and XZ formats directly.

**Q: Why does balenaEtcher need admin/root privileges?**
A: Writing directly to block devices requires elevated permissions on all operating systems.

**Q: Is there a command-line version?**
A: The balena CLI includes flashing capabilities, but the primary interface is the desktop GUI.

## Sources
- https://github.com/balena-io/etcher
- https://etcher.balena.io/

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Source: https://tokrepo.com/en/workflows/asset-0d96a26c
Author: Script Depot