The "Instruments" pages of the JWST Documentation provide detailed information about the four instruments. (These pages can be accessed from the left sidebar, using the Table of Contents below, or as pdf books.) The JWST Pocket Guide provides a top-level summary of all the science instrument capabilities. The icons below lead to the top-level JDox page for each instrument.

Near Infrared Camera (NIRCam)

Near Infrared Imager and Slitless Spectrograph (NIRISS)

Near Infrared Spectrograph (NIRSpec)

Mid Infrared Instrument (MIRI)