J-Link downloads

The J-Link software & documentation pack gives you the USB drivers needed for your system, a number of utilities as well as a dynamically linkable library (DLL on Windows) used by most of the IDEs and debuggers using J-Link.

Also included are a number of sample setup scripts for devices needing one as well as documentation. The package can be downloaded and used free of charge by any owner of a J-Link, J-Trace or Flasher ARM, Flasher RX model.

It is updated frequently. All utilities and features included can be used on any of these units without the need for an additional license, with the exception of J-Flash, RDI and "Unlimited Flash Breakpoints", which require a separate license on most units (not J-Link ULTRA+, J-Link PRO or J-Link PLUS which include all licenses)

J-Link software & documentation pack can also be used with J-Link KS, SAM-ICE, mIDASLink, DIGI JTAG Link and any other licensed J-Link compatible emulator.

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J-Link software & documentation pack for Windows

Installing the software will automatically install the J-Link USB drivers. It also offers to update applications which use the J-Link DLL. Multiple versions of the J-Link software can be installed on the same PC without problems; they will co-exist in different directories.

The package contains:

GDB Server - Support for GDB and other debuggers using the same protocol. GUI & command line version.
J-Link Configurator - Free utility to manage a various number of J-Links connected to the PC via USB or Ethernet.
J-Link Commander - Simple command line utility, primarily for diagnostics and trouble shooting.
J-Link Remote Server - Free utility which provides the possibility to use J-Link / J-Trace remotely via TCP/IP.
SWO Viewer - Free tool which shows terminal output of the target performed via SWO pin.
J-Mem - Memory viewer.
J-Link DLL Updater - Allows to update 3rd party applications which use the J-Link DLL.
Free flash programming utilities - Simple command line utilities which allow programming a bin file into the internal/external flash memory of popular eval boards.
USB driver (Includes driver for J-Links with CDC functionality).
Manuals: UM08001 (J-Link User Guide), UM08003 (J-Flash User Guide), UM08004 (RDI User Guide), UM08005 (GDB Server User Guide), UM08007 (Flasher ARM User Guide).
Release notes for J-Link DLL, J-Flash, J-Link RDI DLL.
J-Flash, including sample projects for most popular eval boards.
J-Link RDI - Support for ARM RDI standard. Makes J-Link compatible with RDI compliant debuggers.

Software and documentation pack for Windows V4.70a [13897 kb]

J-Link software & documentation pack for Linux

The package contains:

GDB Server - Support for GDB and other debuggers using the same protocol. Command line version.
J-Link Commander - Simple command line utility, primarily for diagnostics and trouble shooting.

Software and documentation pack for Linux V4.62a [5271 kb]

J-Link software & documentation pack for MAC

The package contains:

GDB Server - Support for GDB and other debuggers using the same protocol. Command line version.
J-Link Commander - Simple command line utility, primarily for diagnostics and trouble shooting.

Software and documentation pack for Mac OS X V4.62a [8176 kb]

Manuals

Manual	Version	Size
Flasher manual (UM08022)	4.66 Rev. 0	1,079 KB
J-Flash manual (UM08003)	4.66 Rev. 1	553 KB
J-Link manual (UM08001)	4.66 Rev. 0	2,785 KB
J-Link GDB Server manual (UM08005)	4.66 Rev. 0	503 KB
J-Link RDI manual (UM08004)	4.66 Rev. 0	772 KB
J-Link USB Protocol manual (RM08001)	Rev. 7	350 KB

Beta software

We frequently publish new Beta versions. The Beta versions follow our current development version very closely and contain the latest features and improvements. However, the Beta versions are not thoroughly tested, but it is usually safe to assume that the Beta version can be used without risk.

Beta software version Previous software versions

Release notes

Latest J-Link DLL release notes
Latest J-Flash release notes
Latest J-Link RDI DLL release notes

Terms of use

The software consists of proprietary programs of SEGGER, protected under copyright and trade secret laws.
All rights, title and interest in the software are and shall remain with SEGGER.

SEGGER J-Link software may only be used with original SEGGER products and authorized OEM products.
The use of the licensed software to operate SEGGER product clones is prohibited and illegal.
More information...