J-Link / J-Trace Downloads

SEGGER J-Links are the most widely used line of debug probes available today. They've proven their worth for more than 10 years. This popularity stems from the unparalleled performance, extensive feature set, large number of supported CPUs, and compatibility with all popular development environments.

Subscribe to the J-Link software update notification list

Download signature

Our downloads are protected and signed with SEGGER emSecure! More information about signed downloads, how signatures are created and how easy downloaded files can be verified.

J-Link Software and Documentation Pack
 
 
Version
J-Link Software and Documentation pack
  • All-in-one debugging solution
  • Can be downloaded and used free of charge by any owner of a SEGGER J-Link, J-Trace or Flasher model.
    Not all features of it may be available on all J-Link / J-Trace / Flasher models.
  • Updated frequently
  • Release Notes
  • More information
[2024-03-14]
Documentation
 
 
VersionDateFile size
 
Ozone User Manual (UM08025)
Digital signature:  Download emSecure Digital Signature
MD5 checksum: b0489d149c97caabba75a87c62050211
V3.32a
[2024-03-14]3,978 KB  DOWNLOAD
 
SystemView User Manual (UM08027)
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 6d5d72ec9e09714bec6ebd62eb9a4837
V3.52a
[2023-07-17]1,796 KB  DOWNLOAD
 
J-Flash Manual (UM08003)
Digital signature:  Download emSecure Digital Signature
MD5 checksum: c461b9e7ea8520d9f520b0ea0e38ada0
V7.96a
[2024-03-14]641 KB  DOWNLOAD
 
J-Link GDB Server - GDB protocol extensions (UM08036)
MD5 checksum: ffab585b820d8684780de357e6414442
V1.00
[2018-03-27]159 KB  DOWNLOAD
 
J-Link Manual (UM08001)
Digital signature:  Download emSecure Digital Signature
MD5 checksum: c519516fa73770be62b6904473794ccf
V7.96a
[2024-03-14]72 KB  DOWNLOAD
 
License - J-Link SDK
MD5 checksum: 23974332feba9e8984461156ff725614
[2020-05-19]10 KB  DOWNLOAD
SystemView - Real-time Analysis and Visualization
 
 
Version
SystemView

SystemView is a real-time recording and visualization tool for embedded systems that reveals the true runtime behavior of an application, going far deeper than the system insights provided by debuggers. This is particularly effective when developing and working with complex embedded systems comprising multiple threads and interrupts.

SystemView can ensure a system performs as designed, can track down inefficiencies, and find unintended interactions and resource conflicts.

More information

[2023-07-17]
VersionDateFile size
 
SystemView, Target Sources
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 58ca78a8c0c4e013782671b966fbe816
V3.54
[2024-03-05]308 KB  DOWNLOAD
Ozone - The J-Link Debugger
 
 
Version
Ozone - The J-Link Debugger
  • Full-featured graphical debugger for embedded applications.
  • Debug any embedded application on C source and assembly level.
  • Load applications built with any toolchain / IDE or debug the target's resident application without any source.
  • More information
[2024-03-14]
J-Link GDB Server RTOS plug-in SDK
 
 

Allows users to create their own RTOS plug-in for J-Link GDB Server to allow thread-aware debugging in Eclipse environments, using J-Link GDB Server for debugging. The SDK comes with a template project for Microsoft Visual Studio, as well as with the RTOS plug-in for embOS in source code.

Click for downloads
VersionDateFile size
 
J-Link GDB Server RTOS plug-in SDK
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 54cb197a5afaa0da75074bddcd828cab
V1.20
[2024-01-18]241 KB  DOWNLOAD
J-Link OpenSDA - Generic Firmwares
 
 
  • Supports all ARM based NXP boards which comes with on-board OpenSDA (e.g. Freedom board, Tower System, etc.)
  • Implements SWD debug protocol and virtual COM port functionality
  • More information

Click for downloads
VersionDateFile size
 
OpenSDA V1 Bootloader
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 394eb3d002e68073ee318b8c86e42eb5
[2023-01-31]87 KB  DOWNLOAD
 
OpenSDA V2 Bootloader
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 0bf07f3307bdcb8da75c1eed9b6f17e3
[2023-01-31]99 KB  DOWNLOAD
 
OpenSDA V2.1 Bootloader
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 238145da8ce6b1d6688f5819ab96d6cd
[2023-01-31]87 KB  DOWNLOAD
 
OpenSDA V3.2 Bootloader
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 32cf3a59936eb0358d625ba413fc7729
[2023-01-31]64 KB  DOWNLOAD
J-Link OpenSDA - Board-Specific Firmwares
 
 
  • Supports all ARM based NXP boards which comes with on-board OpenSDA (e.g. Freedom board, Tower System, etc.)
  • Implements SWD debug protocol and virtual COM port functionality
  • More information

Click for downloads
VersionDateFile size
 
FRDM-K22F
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 699493f46a363a5bca31a4deb0e41802
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-K28F
Digital signature:  Download emSecure Digital Signature
MD5 checksum: ee6f414701d0524f43b9f9d9e703917c
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-K64F
Digital signature:  Download emSecure Digital Signature
MD5 checksum: ed8ab000b6b3607bfa1f4acf3dd8d274
[2023-01-31]103 KB  DOWNLOAD
 
FRDM-K66F
Digital signature:  Download emSecure Digital Signature
MD5 checksum: b74ba4ca00d9259a7e5fdffcc9e7cfa4
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-K82F
Digital signature:  Download emSecure Digital Signature
MD5 checksum: ab9cda2e4998ae03d452f6c50350df4b
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KE02Z40M
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 585c5cd5f8a359bc88ddf2fcb52095e2
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KE04Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: e1f318342788961d19dd03de7e22dee6
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KE06Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 3c746628aa129f7f96750c2da10e5929
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KE15Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 04b63ae23f31eac98895fe1c1ff2ebe8
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KE17Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: bdaf3aa27b9fd6a0f9628ecbf9e9aa0f
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KL02Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 708d7bdab918f2e1e14abdef2d2c2bf0
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KL03Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: b1ce174897214c46c8ddf3e25ab4f688
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KL05Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: ca14f077d82e92da260ae1b49d0aeabd
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KL25Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 0831184e7a1de08cd449226faf9e34a3
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KL26Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: accf6db9e25b97b0b13274d418667b87
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KL27Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 27e7c9b43b3e517068ca3aba91c30554
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KL28Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: ed985395f98963b35186205d018954fc
[2023-01-31]103 KB  DOWNLOAD
 
FRDM-KL43Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 31db994f09c6159cdf75f5d34544b178
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KL46Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: ca38875c8215777c5438f358debe98a8
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KL82Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: fa6faf142d91167f8aa88056a90d504c
[2023-01-31]103 KB  DOWNLOAD
 
FRDM-KV10Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 5c6276a5f57370e587ca1ce70a8418b8
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KV11Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 5bdad2b9bbb4971318696a10d26de99c
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KV31F
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 8d3adc3fd21e80504c8b62675b518218
[2017-08-21]64 KB  DOWNLOAD
 
FRDM-KW019032
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 1b10b94728920679ea771c2c02f5f2ed
[2023-01-31]103 KB  DOWNLOAD
 
FRDM-KW24D512
Digital signature:  Download emSecure Digital Signature
MD5 checksum: ba0757f946fdd91178f278b7c52a735e
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KW36
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 8f6871c988176495d59790a8d989e3ff
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KW38
Digital signature:  Download emSecure Digital Signature
MD5 checksum: f48ffeff73a4cc02af8094f7f822af20
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KW40Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 619970eda151788a1ff68a9c9eb270f8
[2023-01-31]91 KB  DOWNLOAD
 
FRDM-KW41Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: f789ed6903268d0cf256759a6af10dbc
[2023-01-31]91 KB  DOWNLOAD
 
MIMXRT1020-EVK
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 238145da8ce6b1d6688f5819ab96d6cd
[2023-01-31]87 KB  DOWNLOAD
 
MIMXRT1050-EVK-Hyperflash
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 238145da8ce6b1d6688f5819ab96d6cd
[2023-01-31]87 KB  DOWNLOAD
 
MIMXRT1050-EVK-QSPI
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 238145da8ce6b1d6688f5819ab96d6cd
[2023-01-31]87 KB  DOWNLOAD
 
TWR-K22F120M
Digital signature:  Download emSecure Digital Signature
MD5 checksum: f5bddb8e07a4bf184ff67f9bbb07c08c
[2023-01-31]91 KB  DOWNLOAD
 
TWR-K64F120M
Digital signature:  Download emSecure Digital Signature
MD5 checksum: a83d21b29559c142c93536bfc2387633
[2023-01-31]91 KB  DOWNLOAD
 
TWR-K65F180M
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 26aa2c241afdaf913e584649169da035
[2023-01-31]91 KB  DOWNLOAD
 
TWR-KE18F
Digital signature:  Download emSecure Digital Signature
MD5 checksum: aa94eff0fa45166a4add8f7e0a89bc65
[2023-01-31]90 KB  DOWNLOAD
 
TWR-KL25Z48M
Digital signature:  Download emSecure Digital Signature
MD5 checksum: e070a730954c99810f73822808d42dac
[2023-01-31]91 KB  DOWNLOAD
 
TWR-KL82Z72M
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 869dff0887c4f7514ef04a85d1a362bd
[2023-01-31]103 KB  DOWNLOAD
 
TWR-KM34Z75M
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 68a7f1077314779c46b2d55b3ed81556
[2023-01-31]91 KB  DOWNLOAD
 
TWR-KM35Z75M
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 1c1cfb2232ab28400df381c20d5e4491
[2023-01-31]91 KB  DOWNLOAD
 
TWR-KV10Z32
Digital signature:  Download emSecure Digital Signature
MD5 checksum: b61ef423eab927eb11c6d8fff678479c
[2023-01-31]91 KB  DOWNLOAD
 
TWR-KV11Z75M
Digital signature:  Download emSecure Digital Signature
MD5 checksum: d835b7123d1591755d1efecb02fdef74
[2023-01-31]91 KB  DOWNLOAD
 
TWR-KV31F120M
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 741fb7bde3360ab53875298fb9b0386d
[2023-01-31]91 KB  DOWNLOAD
 
TWR-KV46F150M
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 0b912330c569821e468c37740d81d773
[2023-01-31]91 KB  DOWNLOAD
 
TWR-KW21D256
Digital signature:  Download emSecure Digital Signature
MD5 checksum: d4dc97f39c4b982b0905b957895e1b88
[2023-01-31]91 KB  DOWNLOAD
 
TWR-KW24D512
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 72f1ecf2c66fcc143a0cb7e2fd531a79
[2023-01-31]91 KB  DOWNLOAD
 
USB-KW41Z
Digital signature:  Download emSecure Digital Signature
MD5 checksum: 81fe4e9b2227181b99b15ca1f33ff642
[2023-01-31]474 KB  DOWNLOAD
NXP LPC-Link2 - J-Link-OB Firmware
 
 
  • Supports all ARM based NXP boards which comes with on-board LPC-Link2 (e.g. LPCXpresso boards)
  • More information

Click for downloads
VersionDateFile size
CALLIOPE mini
 
 

We don't only want to reach pupils, but also teachers and the education system, to convey more digital content at schools in the long term and to embed it in the curriculum permanently.

  • Free platform for pupils, teachers, students and hobbyists, for simple embedded systems entry
  • More information

Click for downloads
VersionDateFile size
BBC micro:bit
 
 
  • Converts the on-board debug interface on the BBC micro:bit to a J-Link OB
  • More information

Click for downloads
VersionDateFile size
 
Sample project - Moving LED
Digital signature:  Download emSecure Digital Signature
MD5 checksum: cec58671336319f1b51671c26bf2b5bd
[2016-08-04]12 KB  DOWNLOAD
J-Link Keil PK51 wrapper DLLs
 
 

Wrapper DLLs to use J-Link in Keil PK51 tools (Keil uVision for 8051)

Click for downloads
VersionDateFile size
 
J-Link wrapper DLL for Silicon Labs EFM8 / C8051
Needed to use J-Link in Keil PK51 tools before V9.55. Current versions of PK51 are shipped with this DLL.
MD5 checksum: f32a4189a654a8e197e8d550697207e2
V4.98
[2022-10-28]785 KB  DOWNLOAD
Monitor-mode
 
 
Monitor-mode source code for:
  • SEGGER Embedded Studio (GCC)
  • Any GCC based environment (GCC)
  • IAR EWARM (IAR ARM compiler)
  • Keil MDK-ARM (ARM compiler)
More information
VersionDateFile size
 
Monitor-mode target sources (GCC compiler, IAR ARM compiler and Keil MDK-ARM compiler)
MD5 checksum: d9576442e83df956fac39c49c68bf533
[2023-03-06]
[2023-03-21]26 KB  REQUEST
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..