Hi
MCUXpresso IDE integrates GUI Flash Programmer but it only works for NXP LinkServer debug connection (LPC-Link, LPC-Link2, CMSIS-DAP) (e.g. no support for Segger J-Link or P&E Multilink)

another choice is using debugger. see introduction:
https://mcuoneclipse.com/2017/05/06/using-eclipse-to-program-binary-files-to-an-embedded-target/
NXP doesn't have standalone GUI programmer SW for Kinetis, but our 3rd party company has. for example PEmicro's PROG for ARM® Cortex™ Processors flash programmer software
PEmicro - P&E Microcomputer Systems: Over 30 years as an Industry leader in Embedded Systems Develop...
Have a great day,
Jennie Zhang
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