Heimdall is a cross-platform open-source tool suite used to flash firmware (aka ROMs) onto Samsung mobile devices.

Officially, AMD64/x86-64 (64-bit) or x86 (32-bit) computers running:

• Linux
• macOS
• Windows (XP, Vista, 7 etc.)

However, several third-parties have reported success running Heimdall on ARM chipsets (in particular Raspberry Pi), as well as additional operating systems such as FreeBSD.

Heimdall connects to a mobile device over USB and interacts with low-level software running on the device, known as Loke. Loke and Heimdall communicate via the custom Samsung-developed protocol typically referred to as the 'Odin 3 protocol'.

USB communication in Heimdall is handled by the popular open-source USB library, libusb.

Heimdall is both free and open source. It is licensed under the MIT license (see LICENSE).

Heimdall is maintained and predominantly developed by Glass Echidna, a tiny independent software development company. If you appreciate our work and would like to support future development please consider making a donation.

For more details about how to compile and install Heimdall please refer to the appropriate platform specific README:

• Linux/README (online)

• OSX/README.txt (online)

• Win32/README.txt (online)