If you have a J-link (or are using the J-link image of the development board) you can get the associated utilities for that from the SEGGER site:
SEGGER - The Embedded Experts - Downloads - J-Link / J-Trace
Not all the utilities will work with the J-link OB / Jlink for LPC-Link2, but the J-flash lite will, and can be used to program binary images, including programming of the off-chip flash.
The MCUXpresso IDE also includes a binary / AXF file programmer.