nRF Command Line Tools Desktop tool

Cross-platform desktop software

The nRF Command Line Tools is used for development, programming and debugging of Nordic Semiconductor's nRF51, nRF52, nRF53 and nRF91 Series devices.


  • nrfjprog executable - tool for programming through SEGGER J-LINK programmers and debuggers
  • mergehex executable - enables you to combine up to three .HEX files into one single file
  • nrfjprog DLL - a DLL that exports functions for programming and controlling nRF51, nRF52, nRF53 and nRF91 Series devices and lets developers create their own development tools using the DLLs API
  • SEGGER J-Link software and documentation pack

Available platforms:

  • Windows
  • Linux
  • macOS
Key features

Supports nRF51, nRF52, nRF53 and nRF91 Series

Flash utility

SEGGER J-Link support

HEX file merging

Create your own development tools